它是一种蛋白质，一种特殊的蛋白质，可以加速化学反应。
It's a protein, a specific kind of protein, one that speeds up chemical reactions.
每种蛋白质都包含有一系列的化学元素，就像一本书中的字母一样。
Each protein consists of a string of chemicals, which are like letters in a book.
蛋白质分子有着自身所特有的化学、物理结构；
The structure of protein molecule has its own characteristics.
蛋白质分子有着自身所特有的化学、物理结构；
The structure of protein molecule has its own characteristics.
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