Diazol
重氮盐
🗣️ 情景例句
I have worked hard at my major subject.
我对主修课特别用功。
All things must come to an end.
天下无不散的筵席。
Oh, dear! said Miss Yang. Are you sure you've lost it?
“哎呀！”杨小姐说，“你肯定你弄丢了？”