Perhydrophenanthrene
菲烷, 全氢化菲
🗣️ 情景例句
Pull yourself together.
振作起来。
Enough is as good as a feast.
知足常乐。
Hello, Mr Zhu. I've come to say goodbye. I'm leaving on Sunday.
你好，朱先生。我是来道别的。我星期天离校。