Naphthylhydrazine
萘肼
🗣️ 情景例句
Is it that serious a problem, Grandpa?
这个问题有那么重要吗，爷爷？
You can receive our program at short wave 37.5 MH.
你可在短波37.5赫兹上收到我们的节目。
I can't have been.
我不会开得那么快的。