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keep [ki:p]vt. (kept, kept, keeping)保持(maintain, retain, sustain)，防止(prevent)，保存(preserve)，經營(manage, run)， 飼養(raise, feed, breed)
keep...from...                 使...免于，使...不能
keep up...                    繼續...，堅持...
keep up with...                 跟上...，趕上...
keep ...in mind                 記住...
keep in touch with...             和...保持聯系
keep to...                      堅持...， 信守...
keep off...                      避開...，不接近...
keep... to oneself                對...守口如瓶
keep clear of...                  避開...
keep ahead (of...)                保持(對...的)領先地位
e.g. i'll only keep you a few minutes.
key [ki:]n. 鑰匙，答案(answer, solution)，鍵
the key for the door                 門的鑰匙
the key to a problem                問題的答案
e.g. he is a key witness目擊者，證人 in this case.案例
 
kick [kik]  v. /n. 踢
kick a goal                            踢進一球
kick about(=kick around)                反抗,厭惡
e.g. don't kick the ball into the road.
 
kid [kid] n. 小孩(child)
e.g. he's still a kid, in training.
 
kill [kil]v. 殺死，毀掉(destroy)
kill time                                 消磨時間
kill two birds with one stone                 一箭雙雕
e.g. his wife was killed in a car accident.
 
kind [kaind]  n. 種類(sort, type, category)adj. 仁慈的，和藹的(nice， friendly)
kind of                                  有點兒，有幾分
a kind of...                                一種（的）...
all kinds of...                              各種各樣（的）...
e.g. we often do this kind of exercise.
 
knife [naif] n. 刀，小刀
e.g. i picked up the knife and threw it out of the window.
 
know [nəu]v. (knew, known, knowing)知道(be familiar with, be aware of)，了解(understand, realize)，掌握...的知識(grasp)
be known as...                               作為...而出名
be known for...                               因...而出名
get to know...                                逐漸了解...
know about...                                知道...，了解...
know sth. [sb. ] from...                         把...和...區別開
e.g. i just don't know what to say.
 
knowledge n. 知識(learning)，認識，知道
have a knowledge of ...                           對...很了解
to one’s knowledge                              據...所知
acquire/obtain/gain a knowledge of...                學到...的知識

lab [læb] (= laboratory)n. 實驗室
fridge – refrigerator
phone – telephone
flu - influenza
language lab                           n. 語言實驗室， 語音室
lack[læk] v. 缺乏(be short of)n. 缺乏(absence, shortage)，沒有
lack of ...                                      ...的缺少
for lack of...                                    因缺乏...
e.g. he is lack of passion熱情 in work.
 
lag[læg] n./vi.(lagged, lagged, lagging) 落后(drop behind, get behind)
lag behind ...                                   落在...的后面
e.g. the children always lag behind when we go for a walk.
 
land [lænd]  n. 陸地(earth)，土地(soil)， 國土v. (使)登陸
land transportation                              陸上運輸
forest land                                      林地
e.g. we are glad to be on land again.
 
language  n. 語言(tongue)
an official language                              官方語言
spoken [oral] language                            口語
written language                                  書面語言
e.g. chinese is my native language.
 
laugh  vi./n. 笑
laugh at...                                      嘲笑...
laugh... off                                     用笑擺脫...
laugh in sb.'s face                              當面嘲笑某人
laughter ['lɑ:ftə] n. 笑, 笑聲
e.g. don't laugh at him     laughter is the best medicine.
 
launch vt.發射(導彈、火箭等)(send off, set off)，發起(begin, initiate, set up, start )n. 發射
launch an artificial satellite                     發射人造衛星
e.g. they have launched a man-made satellite successfully.
 
law n. 法律，規律(rule, principle)                  
observe/keep/follow a law                                 守法
enforce a law                                             執法
the laws of nature                                         自然規律
e.g. i have to follow nature's law.
 
lay [lei]vt.(laid, laid, laying) 放置(put, place)，鋪設，布置，產(卵)
lay... off                                        (臨時)解雇...
lay... aside                                       擱置..., 積蓄...
lay down...                                        制定...，放下...
lay out                                            布置, 展示
e.g. we shall have to dig挖under the river to lay the sewage 污水pipe.管道
 
lead [li:d]  v.(led, led, leading) 領導(guide, direct, head, preside over, supervise)，(道路等)通向，導致n. 鉛， 領導
lead sb. in doing...                              領導某人做...
lead a ... life                                   過...生活
lead to...                                        導致..., 通向...
take the lead                                     帶頭
e.g. the guide向導led us to the river.
 
leader ['li:də] n. 領袖，領導者
e.g. he's a follower, not a leader.
 
leadership  n. 領導能力
under the leadership of...                       在...的領導之下
e.g. he shows quality才能 of leadership.
 
learn [lə:n]v. (learnt/learned, learnt/learned, learning)學習(study)，學會(acquire, grasp, master)，得知(know)， 記住(bear in mind, memorize)
learn ...by heart                                記住...
learn from...                                    向...學習
learn of/about...                                得知...， 了解...
e.g. one is never too old to learn.   活到老，學到老。
 
leave[li:v]v. (left, left, leaving)離開(depart, go away, set off)，留下， 使處于（某種狀態）n.假期
leave for...                                     出發前往...
leave ...alone                                   不管...
leave... behind                                  遺留..., 超過...
leave ...out                                     省去..., 遺漏...
ask for leave                                     請假
e.g. what time does the ship leave?
 
lecture   n./v. 演講(speech, address)，講課
attend a lecture                                   聽報告，上課
deliver [give] a lecture                           講課，講演
e.g. his long lecture made us yawn.打瞌睡
 
lend [lend]v. (lent, lent, lending)借給(loan)，貸(款)/ borrow
lend sth to sb                                   把某物借給某人
lend a hand in...                                幫忙..., 參加...
lend itself to...                                 有助于...
e.g. can you lend me money? no way.
 
lesson ['lesn]n. (一節)課(class, lecture)，課程，教訓(example, moral)
 (be) a lesson to sb.                           對某人來說是一個教訓
teach sb. a lesson                            教訓某人
e.g. his car accident has been a lesson to him to stop driving too fast.
 
let [let]v. (let, let, letting)允許(allow, permit, agree to)， 讓，出租(rent, lease)
let alone...                                 更不用說...
let down...                                  放下..., 使失望...
let... off                                   放（炮， 煙火等）， 開（槍）      
let...out                                    放掉..., 泄露...
e.g. i let him go home.
 
letter ['letə]  n. 文字，字母，信函
by letter                                        以書信形式
post a letter                                    寄一封信
e.g. this word has five letters.
 
level ['levl] n. 水平，水平面，等級(grade, standard)adj. 水平的(flat, even，horizontal)
level of living                                 生活水平
e.g. we must increase production levels.
 
liberate['libəreit] v. 解放(set free), 釋放(release)
e.g. our army had liberated many occupied占領的 areas.
 
life [laif] n. 生命，壽命，生活， 生物(creature)
bring...to life                                使恢復，給...以活力
come to life                                  蘇醒過來
for life(= all one’s life)                   一生，終生
life-span                                     壽命
life belt                                     安全帶
life condition                                生存［生活］條件
lead/live a ...life                           過一種...的生活
life style                                    生活方式
e.g. you'll never see life if you stay at home forever.

lift [lift] v.提高(raise, elevate, pick up)，（尤指云， 霧）消散(disappear, vanish)n. 舉起, 電梯(elevator), 搭車
give sb. a lift                                   讓某人搭便車
lift a finger                             [通常用于否定句]出一點兒力
lift the ban on...                                (對...)解禁
lift ... up                                        把...提起來
e.g. he's too weak to lift the box.
 
like  vt. 喜歡(enjoy, love, prefer, be fond of, be interested in, delight in, appreciate)，希望(wish, expect)prep. 像，如同 adj. 相像的(alike)
would like to do                                 想要...
feel like doing                                  想要...
lf you like                                      如果你愿意的話
e.g. it sounds like you enjoyed it.
 
limit['limit] vt.限制, 限定(confine, restrict)n. 界限, 限度(restriction)
set a limit to...                               對...加以限制
limit sb. to (doing) sth.                      限制某人（做）某事
e.g. please limit your shower淋浴 time.
 
 
line n. 線(thread, string), 路線(path, route, way), 電線(electrical wire)，(文章)行vt. 排成一行
be in line with...                           和...一致， 與...符合
line up (for...)                             排隊(等候...)
wait in line(for...)                        排隊等候（...）
be on line                                 （計算機）在線
e.g. hang the clothes on the line.
 
 
link [liŋk]vt.連結(join, connect, unite)，聯系n. 鏈環，連結物
link up                                          聯接，結合
e.g.    is there a link between smoking and lung disease?
 
 
list [list] n. 目錄(catalog), 名單, 列表(schedule)vt. 列出
make a list of...                             列出...的清單
e.g. this is our latest price list.
 
 
listen['lisn]   vi. 聽，聽從
listen to ...                               聽...， 聽從...
e.g. you must all listen carefully.
 
literature n. 文學(作品), 文獻
literature search                          文獻調查, 文獻研究
e.g. literature is a mirror鏡子 of its time.
 
live  v. 活著，生活(exist)，居住(dwell, reside)adj.活的，實況轉播的
live a ...life                      過...生活
live with...                         和...同居，忍受
live for...                           為...而生活
live by...                           靠...生活
live on/upon...                      靠...生存，以...為食
e.g. did you live with your parents?
 
liver n. 肝臟
liver cancer                             肝癌
liver failure                           [醫]肝功能衰竭
liver function                           肝功能
e.g. the doctor says it's just a touch of liver.
 
living['liviŋ]n. 生活(existence, life)，生計adj. 活的，現存的
 (alive, live, existing, surviving)
make one’s living by...                靠...謀生
living conditions                       生活的境況
living room                             客廳，起居室
living cost                              生活費用
living resources                         生活資源
e.g. dying is as natural as living.
 
load [ləud] n. 負荷(burden), 工作量vt. 裝載(fill), 使擔負(burden)
a load of...                          大量的
e.g. the boat received a heavy load.
 
loan [ləun]  n. (借出的)貸款，借出v. 借，借給(lend)
比較 borrow ,lend/loan
borrow 借入
我從他那里借了100美元
e.g. i borrowed $100 from/of him.
loan/lend
他借給我100美元。
e.g. he loaned/lent me $100.
 
locate [ləu'keit] vt. 把...設置在(establish, found, build)，使...坐落于，找到(discover, find)
be located in...                             坐落于...， 位于...
locating device                             定位裝置
e.g. locate the place on this map.
 
location n. 位置(place, position, situation), 場所(site)
e.g. the town is a good location for a young doctor.
 
look [luk]vi. 看，看起來好象(seem, appear)n. 看，面容(face)，外表(appearance)
look at...                                 看...
look after...                              照料...
look for...                                 尋找...
look forward to...                          盼望...，期待...
look into...                                調查..., 觀察...
look up...                                  查閱...
look up to...                               尊敬...
look over ...                               察看...， 檢查...
look down on...                             輕視...，看不起...
 
e.g. he looks nervous.
 
 
lose [lu:z]vt. (lost, lost, losing)遺失(miss)，失去，使迷路，輸掉(fail, get beaten)
lose weight                               減輕體重，減肥
lose one’s way                           迷路
lose one’s courage                       喪失勇氣
lose interest (in...)                     失去（對...的）興趣
lose patience                             失去耐心
e.g. i lost my wallet 錢包yesterday.
 
loss  n. 損失(damage)，遺失，失敗(failure, defeat)
at a loss                                虧本，不知所措
e.g. the loss of her purse錢包 caused her much inconvenience.不便
 
lot  n. 許多， adv 相當
lots and lots of...                     許許多多的，大量的
a lot of...                             非常多的...
a lot                                   非常
e.g. they drew lots to decide which of them should go first.
 
love   n. 熱愛(passion)，愛情(affection)，愛好vt. 愛(like, care for, have a passion for, treasure)，愛好(enjoy)
first love                                初戀
fall in love with...                     愛上...
love at first sight                       一見鐘情
e.g. i love my motherland.祖國
 
luck  n. 運氣，幸運(chance, fortune)
in luck                                    運氣好
out of luck                              運氣不好
e.g. dare勇敢，大膽 and diligence 勤奮bring luck.
 
lung  n. 肺
lung cancer                                    肺癌
e.g. smoking can cause lung cancer.