Secocubane
拟方烷, 三环辛烷
🗣️ 情景例句
I've got to call a caterer.
我应该给宴会承办者打一个电话。
How much will the hospital bill be?
住院费大概是多少钱？
There she studied the teaching of deafblind children.
在那里，她学习聋盲儿童的教学工作。