Olefine
[化] 烯烃; 链烯烃
🗣️ 情景例句
Robbie! Who is it? Robbie
是谁呀？
A man of gladness seldom falls into madness.
生性乐天的人极少会变成疯子。
There's no need to be worried. We're both fine.
没有必要嘛。我们两个都挺好。