Nacrum
(=nacre)珍珠质
🗣️ 情景例句
You don't have to work yourself sick.
你不必让自己工作到病倒。
I wrote to my uncle last night.I couldn't put it off any longer.
我昨晚给我的叔叔写了信.我不能再推迟寄信了。
Then Von Frisch moved the dish to the east of the hive and waited for a marked bee to feed.
然后，冯·弗里施把碟子移到蜂箱的西边，等待有标记的蜜蜂来吃。