Spirocyclane
螺环烷(专指：螺戊烷)
🗣️ 情景例句
He'll be fine, Marilyn.
他不会有事的 ，Marilyn。
Wouldn't you like some coffee?
你想要一些咖啡吗？
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。