Bifluoride
[机] 氟氢化物
🗣️ 情景例句
and I promise you I won't forget.
我向你保证， 我不会忘的。
When did you know the answer?
你什么时候知道答案？
She was a famous actress When I was still at school.
当我还是学生时，她就是个著名的演员了。