Allenes
二烯烃
🗣️ 情景例句
I know who you are.
我知道你是谁。
The road to hell is paved with good intentions.
徒有良好的愿望而不去努力实现，后悔莫及。
The life history of the individual is first and foremost an accommodation to the patterns and standards traditionally handed down in his community.
个人的生活史首先就是适应他的社团世代相传形成的生活方式和准则。