Pyrazine
吡嗪, 对二氮杂苯, 胡椒嗪
🗣️ 情景例句
I mean, there seems to be something to celebrate all the year round.
我的意思是，好像一年到头都要忙着庆祝似的。
A fool can ask more questions than seven wise men can answer.
一愚发问，七智结舌。
Yes. You have to practise a lot.
是的，你得大量的练习。