Fd50
[医] 半数致死量
🗣️ 情景例句
and work begins at eight in the morning for me.
早晨八点我就得开始工作。
For professional footballers, injuries are an occupational hazard.
对于职业足球运动员来说，受伤是职业本身带来的危险。
This case doesn't belong to me!You've given me the wrong case!
这箱子不是我的！您给错了！