Filtros
[医] 硅沙人造石(处理污水用)
🗣️ 情景例句
Why, yes.
当然可以。
No one is wise at all times.
人总有一时之失。
Now, this is the chemistry lab. Have you been in this lab before?
好啦，这是化学实验室。你们以前到过这个实验室吗？