牛奶是一种常见的过敏原,会导致一些人起皮疹。

Milk is a common allergen that can cause skin rashes in some people.

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Milk is a common allergen that can cause skin rashes in some people.

allergen 是由名词 allergy(过敏)加上后缀 -gen(产生...的物质)构成的名词,字面意思是"产生过敏反应的物质",即"过敏原"。

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