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(1)(身體)虛弱的(lacking in physical strength or power)：be (feel)～after an operation/a long illness/an attack of fever 手術(shù)/長期生病/發(fā)燒后身體(感到)虛弱;be(feel)～from hunger/with exertions 餓得無力/勞累得體虛; (illness) make sb～(病)使某人體弱; too～to walk far 體弱難以走得太遠; be～in body but not in mind 體弱心不老; The old man was～and ill. 這位老人體弱多病。Her health was too～. 她的身體太虛弱了。My legs felt～/I felt～in the legs.我的腿軟弱無力。as～as water/cat (fig) 身體虛弱;意志薄弱;〖同〗faint，weakened;〖反〗 strong;

(2)脆弱的，不堅固的 (likely to break，collapse or fail; not strong enough)： a～barrier/fort/fortification/foundation/bridge 不堅固的屏障/堡壘/要塞/地基/橋; a～defence/link in a chain/link in an electrical system 脆弱的防御工事/易斷的鎖鏈/薄弱的電力系統(tǒng)中繼; a table with～legs 一張腿不穩(wěn)的桌子; a～army/team/nation 無戰(zhàn)斗力的部隊/弱隊/弱國; in a～position 處于不利地位; (small farmer) be economically～by himself (小農(nóng))個體經(jīng)濟實力弱;The branches are too～to support the boy's weight. 樹枝太不結(jié)實，支撐不住男孩的身體重量。The shelves are too～to hold the goods. 架子太不結(jié)實，承受不住這些貨物。The walls are too～to hold up the roof. 墻太不堅固，無法支撐房頂。These pit props are～for the load. 這些礦用支架不結(jié)實，承受不住其負載。The supporters are～for the weight. 支柱不結(jié)實，無法承重。〖同〗breakable，delicate;〖反〗strong，powerful，strengthened;

(3)軟弱的(not strong enough in nature)： a man of～character 意志薄弱的人; be～by nature 生性軟弱; a～law/measure 無力的法律/措施; a～creature 懦弱的人; a～leader/president/government/monarch 軟弱的領(lǐng)導(dǎo)/總統(tǒng)/政府/君主;～leadership 無能的領(lǐng)導(dǎo); He took a～stand on the issue. 他在這個問題上立場不堅定。be outwardly strong but inwardly～外強中干; He is not～when it comes to facing a danger. 面對危險，他一點兒也不怯懦。Everyone has some～spots. 每個人都有弱點。She is too～to disagree with others/to defend her rights/to give up her bad habit. 她太軟弱了，不敢對別人說不/不能保護自己的權(quán)益/不能改掉壞毛病。the～er sex 女性;〖同〗powerless，soft;〖反〗strong，tough，powerful，firm;

(4)(經(jīng)濟)不景氣的，疲軟的(not financially successful or good)： a～currency/economy 疲軟的貨幣/不景氣的經(jīng)濟; a～market for agriculture stocks 農(nóng)業(yè)股票市場疲軟;

(5)功能欠缺的(not functioning properly)：have a～heart/stomach/mind/pulse 心臟衰弱/胃功能弱/頭腦愚笨/脈搏微弱;He has～eyes. 他視力不好?！玸ight 弱視;be～in sight/hearing 視力/聽力差;

(6)缺乏說服力的(not powerful，effective or convincing)：He presented～answers/arguments/evidence. 他作出的回答/提出的論點/提供的證據(jù)缺乏說服力。the～points of an argument 論據(jù)上的弱點;a～alibi/plot 沒有說服力的托詞/無感染力的劇情; Her story sounded～even to her own ears. 她的陳述連自己聽起來也覺得缺乏說服力。〖同〗unconvincing;〖反〗 convincing，forceful，powerful，sound;

(7)微弱的(faint or dim)：～sunlight 昏暗的陽光; a～light/signal/sound 微弱的光線/信號/聲音; manage a～smile 強裝出微笑; speak in a very～voice 用微弱的聲音說; The light is too～to read by. 光太弱了，不能藉以讀書?！纪絛im，faint;〖反〗strong，powerful，beaming，brilliant;

(8)稀釋的，多水的(having or containing too much water than normal)：～tea/soup 淡茶/稀湯; a～solution of acid 稀酸溶液; Do you wish your coffee～or strong? 你想要淡咖啡還是濃咖啡? Please don't make my coffee too～. 請不要把我的咖啡沖得太淡。〖同〗watery，thin;

(9)沒有能力的，達不到標(biāo)準(zhǔn)的(not competent or not up to the high standard) [A(at/in/on)][作 pred]：be～at handwork 手工做不好;I'm～at/in mathematics. (My mathematics is～.) 我的數(shù)學(xué)不好。These people are not～in mind.這些人頭腦靈活?！玦n the head 笨的，傻的;be～in intelligence/pronunciation /science /spelling /practical matters 在智力/發(fā)音/理科/拼寫/實際做事方面有欠缺; be～on names/the classical music 記不住人名字/不懂古典音樂; His essay/book/review was～on the period of the social changes.他的論文/書/評論對社會變革期間的論述水準(zhǔn)不高。be～of brain/understanding 頭腦遲鈍/理解力差;〖同〗incompetent，incapable;〖反〗competent，capable，able;

weak at the knees 兩腿發(fā)軟，幾乎站不住(infml)： The dead body made me go all～at the knees. 那死尸嚇得我兩腿發(fā)軟。

in a weak moment 易被誘惑或說服的時刻： In a～moment，I gave up my arguments. 一時心軟，我放棄了爭辯。

the weak n 弱者;身體虛弱的人;貧窮者(pl，接pl動詞)：The～are bullied by the strong at school. 弱小的學(xué)生在學(xué)校受到強壯學(xué)生的欺負。

→′weaken v 使弱;變?nèi)?猶豫不決;?weak-′headed adj 愚笨的，遲鈍的;?weak-′hearted adj 怯懦的;心腸軟的;?weak-′kneed adj 易屈服的;優(yōu)柔寡斷的;′weakling n 虛(軟)弱的(人);′weakly adj & adv 虛弱的(地);軟弱的(地);?weak-′minded adj 低能的;懦弱的;不果斷的;?weak-′mindedly adv 遲鈍地，愚笨地;′weakness n 軟(虛)弱，優(yōu)柔寡斷;

【辨異】weak 與 weakly 和 feeble 均可以指人體虛弱，沒有力量。weak 是常用字，形容由于年幼、年老或生病人身體虛弱沒有充分的精力和體力，如：She has weak legs.(她的腿虛弱無力。)weakly(虛弱的)形容人久病體虛，或身體素質(zhì)不強壯，如： a weakly child(一個不壯實的孩子); feeble(衰弱的，無效的)與 weak 相當(dāng)，但有可憐等含義，如： She is too feeble to walk far.(她虛弱得走不遠。)