这种非常极其细小的弹簧，可以上下运动。

The tiny-tiny little springs, that move up and down, okay.

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因此这些沙漠植物进化出保持水分的各种方式，包括长着极其细小的叶子以缩减暴露在炎炎烈日中的面积。

And so desert plants have evolved ways to stay hydrated, including sporting tiny leaves to reduce the surface area exposed to the sun's water-zapping rays.

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由于新头发存在缺陷，所以变得极其细小，以至于我们肉眼无法看到，这便形成了头上光秃的区域和后退的发际线。

A manufacturing defect means the hair produced is so small it appears invisible to the naked eye, giving the classic bald spot or receding hairline.

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