Spirocyclane
螺环烷(专指：螺戊烷)
🗣️ 情景例句
I got it!
我知道了。
What's your nationality?Are you American?
你的国籍是什么?你是美国人吗？
He felt free to talk about his failures or his difficulties.
他可以随便谈论自己的失败或困境。