Nanon
毫微米(等于10的-9次方米)
🗣️ 情景例句
I don't buy it.
我可不买你的账。
John is not forty-five yet,is he?
约翰不够45岁,是吗？
It must have been a gas that could burn but that would not explode, a gas that did not smell strong, and a gas that did not kill people.
它一定是一种能够燃烧而不能爆炸的气体，一种味道不很强的而且不使人致死的气体。