Alkylene
亚烃基, 烯化, 烷撑
🗣️ 情景例句
Well, it's a very easy operation, Carl.
这是个很简单的手术 Carl。
There is no smoke without fire.
无风不起浪。
I hate to interrupt a man when he's busy working,
当一个人在忙着干活时，我是不愿意去打断他的，