Bifluoride
[機] 氟氫化物
??? 情景例句
How could I forget?
我怎么會忘呢？
I haven't nothing to declare.
我沒有要申報的東西。
I have two cats. One is white, the other is black.
我有兩只貓，一只是白貓，另一只是黑貓。