L.f.d.
[医] 最低致死量(毒素)
🗣️ 情景例句
Do you think the end is all right?
你看结尾还行吗？
The Senator acceded to his defeat before the end of the election.
那位参议员在选举结束以前就承认落选了。
I received an invitation, but I did not accept it.
我收到-份请帖，但没有接受。