Bicyclooctane
二环辛烷
🗣️ 情景例句
Nowadays in the USA, more and more young people are losing interest in politics.
正在的美国，越来越多的年轻人对政治丧失了兴趣。
Don't leave before I return.
在我回来之前请不要离开。
You're going out of your way for us, I believe.
我相信这是对我们的特殊照顾了。