Paroxypropiophenone
對羥基苯丙酮
??? 情景例句
He bites off more than he can chew.
貪多嚼不爛。
While you were writing letters,I was reading a book.
當你正在寫信時，我正在讀一本書。
Reading is only a partial solution,
看書只能解決部分問題。