交换氧气

changes over───对换，对调位置；改变成；转接

exchange force───[量子]交换力

exchange forces───[量子]交换力

exchange rate───汇率；兑换率

exchange rates───汇率；外汇汇率（exchangerate的复数）

exchange student───交换生；交换的留学生

exchange messages───[计]交换信息

Ochratoxin a may act by induction of DNA strand breaks, sister chromatid exchanges, DNA adduct formation, or reactive oxygen but the mechanism of action as a toxin is not yet resolved.───赭曲毒素A通过诱导DNA链的断裂、姐妹染色单体的互换、DNA加合物的形成或者活性氧发挥作用，但是作为一种毒素其作用机制仍然没有被解决。

Teflon - lined pipe, casing, elbow, the three exchanges or four, size head, cylinder, air compressor - oxygen - ring, gasket seal ring and auto parts.───聚四氟乙烯内衬直管， 套管，弯头，三通，四通，大小头，筒体，空压机-制氧机- 活塞环、密封圈和汽配封圈。