L.f.d.
[医] 最低致死量(毒素)
🗣️ 情景例句
I think I see some fish right under us, Dad.
爸爸， 我想我看见一些鱼就在我们下方的水 。
I don't feel very well this morning.
我今早感到不很好。
No, I need to talk to the home office.
不，我得先跟总公司谈谈。