Valve gear
[機(jī)] 閥動(dòng)機(jī)構(gòu)
?? 詞語組成解析
valve
[v?lv]
n. 閥;真空管;（管樂器的）活栓;（心臟的）瓣膜;
vt. 裝閥于;以活門調(diào)節(jié);
gear
[ɡ?r]
n. 齒輪;排擋;傳動(dòng)裝置;衣服 ;
vi. 接上;調(diào)和;
vt. 使適應(yīng);裝上齒輪;用齒輪連接;
??? 情景例句
No, not yet. What about you?
不， 還沒有。你呢？
He is having a nightmare.
他在做著噩夢。
'Would you mind my coming with you?' he asked, before I had finished speaking.
“我跟你一道去行嗎？”沒等我說完話他就問道。