Epithecium
囊层被, 囊盘上层
🗣️ 情景例句
What am I supposed to do?
我该做什么？，
What for?
何必呢？
It is impossible to give a satisfactory explanation for a pot-holer's motives.
要想对洞穴探险者的动机作出满意的解释是不可能的。