Fd50
[医] 半数致死量
🗣️ 情景例句
I suppose you want to apply to Columbia.
我猜想你会申请Columbia大学。
That is why we have asked you to come tonight.
这也就是我们今晚请你们来的原因。
The majority of thepatients attending the medical out-patients departments of our hospitals
在医院门诊部看病的大多数人