Reciprocating vacuum pump
[化] 往復式真空泵
?? 詞語組成解析
[醫] 交互的, 往復的
pump
[p?mp]
n. 抽水機;打氣筒;泵;輕軟舞鞋;
v. 用泵輸送 ;涌出;急速搖晃;盤問;
??? 情景例句
I want to make a deposit.
我想存錢。
Better is the neighbour's hen than mine.
人莫知其苗之碩。
Four days after setting out, while the Titanic was sailing across the icy water of the North Atlantic,
“泰坦尼克”起航后的第4天，它正行駛在北大西洋冰冷的海面上。