a vegetable with a strong smell and flavour, made up of several layers surrounding each other tightly in a round shape, usually brown or red on the outside and white inside

I always cry when I'm chopping onions. 我切洋葱的时候总是被呛得流眼泪。

Fry the onion and garlic for about two minutes. 把洋葱和大蒜炒大约两分钟。