Pek
[化] 聚醚酮
🗣️ 情景例句
What are you up to?
你在忙些什么？
I'm glad to hear about your promotion.
我很高兴听到你升迁的消息。
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。