Ppt.
[医] 沉淀[物], 制备的, 精制的
🗣️ 情景例句
Columbia? Why Columbia?
Columbia？为什么要去Columbia？
One scabbed sheep will mar a whole flock.
一羊生癣，群羊受害。
Two main techniques have been used for training elephants,
驯象有两种主要的方法，