Fd50
[医] 半数致死量
🗣️ 情景例句
I thought you wanted to go to Columbia.
我还以为你只想上Columbia大学。
Better is the neighbour's hen than mine.
人莫知其苗之硕。
I got a bad headache, and my nose is running.
我头痛得厉害，还流鼻涕。