当眼中进入异物时我们就会流泪——洋葱的气味会薰痛双眼，小昆虫飞进眼角膜也会刺激泪腺。

We produce tears in response to insults to the eyes — the sting of onion fumes, a tiny insect that flew into your cornea.

youdao

当眼中进入异物时我们就会流泪——洋葱的气味会薰痛双眼，小昆虫飞进眼角膜也会刺激泪腺。

We produce tears in response to insults to the eyes — the sting of onion fumes, a tiny insect that flew into your cornea.

youdao