Ld
致死剂量
🗣️ 情景例句
I was a member of the debate team.
我是辩论队的成员。
I can't believe his story.
我无法相信他的说法。
I live near an airport and passing planes can be heard night and day.
我住在一个机场附近，过往飞机日夜不绝于耳。