Fd50
[医] 半数致死量
🗣️ 情景例句
I'm sure I won't. I really appreciate all of your hospitality.
这点我相信。我真的很感激你的招待。
He has graciously consented to speak to us on that subject tonight.
他同意今晚他将就这一专题演讲。
Not bad.
还不错。