For example, by random folding, the amino-acid chain of the enzyme ribonuclease, a small protein, could adopt more than 1040 different shapes, which would take billions of years to explore.
例如，通过随机折叠，核糖核酸酶(一种小型蛋白质)的氨基酸链能形成超过1040种不同的结构，单这一种蛋白质就需要数亿年的时间来探索。
The Friz thinks a field trip is in order to explore what teeth do and why they have different shapes.
弗莱多老师认为，要想让同学们了解牙齿的作用、牙齿为什么有这么多不同的形状，就必须带他们去进行一次实地考察。
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