Ppt.
[医] 沉淀[物], 制备的, 精制的
🗣️ 情景例句
Thanks a lot for having us.
真感谢你邀请我们来。
It is easier to give good counsel than to follow it.
提出忠告易，照著办事难。
Look at those people in the boats.
瞧船里的那些人！