废气
... use value 实用价值 ... used air 废气 ... used liquid 废液;用过的液体 ...
用过的空气
... 用过的级 expended stage 用过的空气 used air 用过的口令 passwords used ...
我们从肺里呼出废气。
In 1997, the Pathfinder Mission used air bags to successfully land on Mars.1997年,探路者号就用空气袋成功地着陆火星。
France has used air strikes and heavy weapons to attack the insurgents.法国攻击反叛分子时采用了空袭和重型武器。