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(1)運(yùn)轉(zhuǎn)，工作(act，process or way of operat-ing)[U]：a machine no longer in～一臺不再運(yùn)轉(zhuǎn)的機(jī)器;understand the～of a computer 了解計(jì)算機(jī)的運(yùn)轉(zhuǎn)機(jī)制;instructions for the～of machinery 機(jī)械操作說明;The～of the valves needs improving.閥的工作情況需要改進(jìn)。Her mother began～of a small grocery.她的母親開始經(jīng)營一家小型食品雜貨店。All his time is devoted to the～of his business.他的所有時(shí)間都用來經(jīng)營他的企業(yè)?！纪絩unning，working，conduct;

(2)手術(shù)(act of cutting open or cutting off a part of the body in order to cure disease)[C][N(on)(for)，N+to-inf](亦作op)：She had an～on her eye/for appendicitis.她的眼睛/闌尾做了手術(shù)。He had a heart transplant～.他接受過心臟移植手術(shù)。Two days later the～was performed on her for cancer of the lung.兩天以后給她做了肺癌切除手術(shù)。The doctor performed an～to amputate his left leg.醫(yī)生給他做了左腿截肢手術(shù)?！纪絪urgery;

(3)公司(business company)[C]：an electronics～一家電子公司;

(4)行動(action or process，esp when planned)[C]：mount a rescue～發(fā)起營救行動;intelligence～s 情報(bào)活動;The whole～only took five minutes.整個(gè)行動只用了五分鐘。

(5) 1)軍事(作戰(zhàn))行動(organized movements，activities of soldiers)[C通常pl](亦作ops)：military/guerrilla～s 軍事行動/游擊戰(zhàn);The general was in command of～s in the south.那位將軍負(fù)責(zé)指揮南方的軍事行動。2)[C，sing](用作軍事行動代號的一部分)(cap);O～Overlord 霸王計(jì)劃(第二次世界大戰(zhàn)中由美國制訂的從西部進(jìn)攻歐洲的軍事計(jì)劃代號);3)(工商業(yè)等)有計(jì)劃的業(yè)務(wù)活動(planned campaigns in industry，business，etc)[C，通常pl]：building/banking/business～s 建筑業(yè)/銀行業(yè)/商務(wù)活動;The company will soon begin～s.那家公司不久就要開始營業(yè)。Learn about the company's～s.好好學(xué)學(xué)該公司的業(yè)務(wù)活動。

(6)運(yùn)算(mathematical process，as addition，multiplication，etc，or an instance of its application)[C];

bring sth/come into operation;be in operation(使某事物)生效(起作用)：Their plan has been in full～.他們的計(jì)劃已全面實(shí)施。When does the law come into～?此項(xiàng)法律什么時(shí)候開始生效?

←′operate v;

→ope′rational adj操作上的;業(yè)務(wù)上的;軍事行動上的