Prebeveling
预开坡口
🗣️ 情景例句
You did a good job.
你做得真棒！
I must be off soon.
我很快就得走了。
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。