Fd50
[医] 半数致死量
🗣️ 情景例句
Do you come here for the sports game or sightseeing?
您来这儿是参加运动会，还是观光的？
All is not gold that glitters.
闪闪发光的不见得是金子。
At night, families often stay in the open air near their houses.
晚上很多人家常呆在附近户外。