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v (1)咳嗽(send out air from the lungs and out of the mouth with a loud noise，esp to clear one's throat or when one has a cold，etc)[I]：She～ed to clear her throat.她咳了一下以清清嗓子?！玝adly/nervously咳得厲害;Cover your mouth when you～.咳嗽時遮住嘴。The engine～ed but would not start.(fig)發(fā)動機干響，就是不起動。

(2)咳出(clear sth out of the throat or lungs by coughing)[T+n，T+n+adv(up)]：～(up)blood咯血;～(up) a fish bone/some phlegm把魚骨/痰咳出來;Try and ～up the mucus.盡力把濃痰咳出來。The car's～ing smoke.那車子直噴煙。

cough up 不情愿地說或做：C～up， who did it? 說出來，這是誰干的? With a bit of persuasion，he'll～up a few pounds.稍微勸一勸，他會拿出幾英鎊的。

n (1)咳嗽(病)(illness，infection，etc of the throat or lungs that makes one cough often)[U，a～]：have a (bad)～咳嗽(很厲害);have a smoker's～因抽煙而咳嗽;～medicine/drops/mixture/syrup咳嗽藥/咳嗽藥片/止咳混合劑/咳嗽糖漿;

(2)咳嗽(聲)(act or sound of coughing)[C]：give a nervous/quiet ～拼命/輕輕一咳;I heard a gentle～behind me and turned to see someone making a sign to me.我聽見身后有人輕聲咳了一下，回頭一看，有人在朝我打手勢。