L.f.d.
[医] 最低致死量(毒素)
🗣️ 情景例句
What material is this made from?
这是什么材料做的？
The party was fresh in her memory.
那次聚会在他脑海里记忆犹新。
Some of my acquaintances in the country come up to town once or twice a year to visit the theatre as a special treat.
我在乡村有一些熟人，他们每年进城来看一回或几回戏，并把此看作一种特殊的享受。