Propene
n. 〈化〉丙烯
🗣️ 情景例句
but it's too early to know for sure.
但我现在还不能决定。
A present!
有礼物！
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
这些卫星绕着地球转，帮助我们更好地了解地球、天气和其他情况。