Polytrifluorochloroethylene
聚三氟氯乙烯
🗣️ 情景例句
Rotten weather, isn't it?
天气糟透了， 不是吗？
It is an equal failing to trust everybody, and to trust nobody.
信任一切与不信任任何人，同样是弱点。
He'll return to London the week after next.
再下个星期他将返回伦敦。