英语语法分析

Lactose is a naturally occurring sugar found in milk.

乳糖是牛奶中的天然糖分。

People who are lactose intolerant or have a milk allergy.

有乳糖不耐症和牛奶过敏的人。

But this is crazy when most Asians are lactose intolerant.

但是由于亚洲人无法接受乳糖，这件事就变得很疯狂。