Fd50
[医] 半数致死量
🗣️ 情景例句
but now what?
但下一步怎么办？
All right. Should I take a look at your battery?
好的。要不要检查一下蓄电池？
Meanwhile, a number of university students have volunteered to drive buses while the strike lasts.
与此同时，有一部分大学生自愿在罢工期间驾驶公共汽车。