Difluoride
二氟化物
🗣️ 情景例句
There is something I want to ask you about clause 8.
我想问你有关第八条款的事。
These buildings are supposed to be earth quakeproof.
这些建筑物是耐震建筑才对。
Where shall we go this evening?
今晚咱们去哪？