Ppt.
[医] 沉淀[物], 制备的, 精制的
🗣️ 情景例句
Have you ever done any work in this field?
你曾经干过这一行吗？
All work and no play makes Jack a dull boy.
只工作，不玩耍，聪明小孩也变傻。
You can call me any time.
你可以随时打电话给我。