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n(1) 疲勞(乏，倦);勞累(great tiredness resulting from hard work or efforts) [U]：physical/mental～體力/精神上的疲勞;suffer from～感到疲勞;drop with～由于疲勞而倒下(死去);relieve sb of his～使某人解除疲勞;His～was great after climbing the mountain. 登山之后，他感到極為疲倦?！纪絫iredness，exhaustion，weariness，overtiredness;〖反〗energy，vigour;

(2) (金屬材料的) 疲勞(weakness in metals caused by continued use) [U]：show signs of metal～出現(xiàn)金屬疲勞的跡象;Metal～is the chief reason for the air crash. 金屬疲勞是造成這次飛機失事的主要原因。

(3) 令人疲憊的工作;(軍隊中的) 雜務(wù)(manual labour;hard work done by a soldier which is not a military nature) [C]：make sb do～s 迫使某人干重活;put sb on～s 讓某人干雜務(wù);be on～duty (輪到)干雜務(wù);recover from～s 從疲憊的工作中恢復過來;

(4) (士兵干雜務(wù)時穿的) 工作服(clothing worn by soldiers for heavy duty or field work) [pl];

→ fa′tigueless adj 不知疲勞的;fa′tiguesome adj 累人的;

v 使疲勞(cause sb to feel very tired) [T+n]：feel/get～d 感到/搞得很累;The work～d the man. 工作使那人非常疲勞。He was～d by the march. 他被行軍累壞了。find sth～ing 發(fā)現(xiàn)某事很累人;The work is very～ing. 這項工作很累人?！玦ng work 讓人疲憊不堪的工作;The patient～s easily. 病人很容易疲勞?！纪?exhaust，tire，overtire，weary;〖反〗 rest，refresh，restore，renew，relieve;

【注意】 fatigue的-ing 形式一般用作形容詞。