Hexaphene
[化] 己芬; 萘并[2,3-a]并四苯
🗣️ 情景例句
Oh, you think you're going to have a hard time
你认为需要大费周折
He's absorbed in his book.
他全神贯注地读书。
Yes. This is Mary speaking.
是的，我是玛丽。