Difluoride
二氟化物
🗣️ 情景例句
It's good! It's this Sunday at 7.
好极了。宴会再本周日7点。
Do you have any openings?
你们有空缺吗？
I had to think of a way of preventing him from following me around all morning.
我得想办法不让他整个上午缠着我。