Ld-50
[医] 半数致死量
🧩 词语组成解析
致死剂量
fifty
🗣️ 情景例句
How many karats do you want?
你要几克拉的？
I don't want to be bitten.
我可不希望被它咬一口。
You'd better go to bed earlier tonight, if you can.
如果可能，你今晚最好早点儿睡觉。