Pentanitrocellulose
五硝基纤维素
🗣️ 情景例句
Are you being waited on?
您需要服务吗？
A handful of common sense is worth bushel of learning.
一点小常识常胜过很多有价值的学问。
Can't you see? They're round, like the moon. Have one, please.
你没看见吗？它们像月亮一样，圆圆的。请吃一个吧。