Fd50
[医] 半数致死量
🗣️ 情景例句
I understand your feelings about it, Richard.
我了解你对这种事的心情， Richard。
Childhood shows the man, as morning shows the day.
看人看年少，看天看破晓。
The seasons of the year in England and the USA are nearly the same.
在英国和美国，一年之中的季节几乎与中国相同。