Perhydrophenanthrene
菲烷, 全氢化菲
🗣️ 情景例句
Keith and I are through.
基思和我已经不再来往了。
Why did you sit up so late?
为什么你这么晚还不睡觉？
One authority on spiders made a census of the spiders in grass field in the south of England,
一位研究蜘蛛的权威对英国南部一块草坪上的蜘蛛作了一次调查。