Piston-engine
[機(jī)] 活塞發(fā)動(dòng)機(jī)
?? 詞語組成解析
piston
['p?st?n]
n. <機(jī)>活塞;
engine
['end?in]
n. 發(fā)動(dòng)機(jī)，引擎;工具;火車頭;機(jī)車;
vt. 給…安裝發(fā)動(dòng)機(jī);
??? 情景例句
Good luck! And stop worrying!
祝你好運(yùn)， 別再擔(dān)心！
I'd like to make an appointment with Professor Smith. Would 9:00 tomorrow be all right?
我想和史密斯教授約個(gè)會(huì)面時(shí)間。明天9點(diǎn)行嗎？
2 'It's possible, but not worth doing.'
二、 可能，但不值得做。"