索思英语解码单词（第477个）——protein蛋白质

protein [ˈproʊtiːn] n. 蛋白质

英英解释（牛津词典）：

a natural substance found in meat, eggs, fish, some vegetables, etc. There are many different proteins and they are an essential part of what humans and animals eat to help them grow and stay healthy.

protein的特点：

肉、蛋、鱼、蔬菜等中的天然物质（a natural substance found in meat, eggs, fish, some vegetables, etc）有许多不同的蛋白质（There are many different proteins）它们是人类和动物饮食的重要组成部分，帮助它们生长和保持健康（ and they are an essential part of what humans and animals eat to help them grow and stay healthy.）

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根据艾宾浩斯记忆原理，请复习单词：

索思英语解码单词（第476个）——vitamin维他命

索思英语解码单词（第474个）——nutrient营养物

索思英语解码单词（第471个）——beer啤酒

索思英语解码单词（第466个）——evening傍晚