Traces of surface corrosives are, however, necessary for the chem. ical reaction to take place.

少量的表面锈蚀是漆膜的化学反应发生的必要条件。

youdao

Skylan:But you can do my O-chem paper in under an hour.

史凯兰：但是你会在一个小时内做完我的有机化学作业。

youdao

Skylan:But you can do my O-chem paper in under an hour.

史凯兰：但是你会在一个小时内做完我的有机化学作业。

youdao