Diazoethane
重氮乙烷
🗣️ 情景例句
Now would be a good time, I think, for some introductions.
我想，下面是作些介绍的时候了。
Dumb dogs are dangerous.
哑犬最凶恶。
It is always wiser and safer to face up to reality,
遇事采取面对现实的态度总是比较明智和稳妥的，