Each strand of spider silk is 1,000 times thinner than a strand of human hair.

蜘蛛丝比人类头发细 1000 倍。

It is thinner than a human hair.

它比人的头发还细。

It's all made out of his human hair.

一顶完全由他们自己头发做成的假发。

They're interesting because they're made of human hair.

它们很有趣，因为它们是由人的头发制成的。

In other words, it is thinner than a human hair.

换句话说，它比人的头发还细。

That's one one-thousandth the width of a human hair.

相当于人类发丝直径的千分之一。

A human hair is thousands of times thicker, for example.

纳米线比人的头发丝细千倍。

That is about one-thirtieth the width of a human hair.

这一直径大致相当于人类头发宽度的三十分之一。

Sea otter fur, for example, is about a thousand times denser than human hair.

例如，海獭皮，海獭皮比人类的毛发要浓密大约一千倍。

PM2.5 particles are about 30 times smaller than a human hair.

PM2.5颗粒比人的头发丝还小30倍。

The smallest snowflake could be as small as a human hair.

最小的雪花有人的头发那么小。

A single virus is about one-thousandth the width of a human hair.

一个病毒的大小约为人类头发宽度的千分之一。

Just so you know, a human hair is 100 times wider than that!

你要知道，人的头发比它宽 100 倍！

This capillary motion is in full effect in xylem filaments thinner than human hair.

在木质纤维中毛细作用无处不在，这些木质纤维比人的头发还细。

That size is about 3% the size of a human hair or smaller.

这一直径相当于人类头发丝的3%或更少。

The scales are made of keratin, the same stuff as human hair and fingernails.

鳞片是由角蛋白组成的，和人类的头发和指甲是一样的东西。

The mirrors are so small they are about the size of a human hair.

镜子如此之小，差不多是人类发丝的大小。

Her tears may be made of glass but her hair is real human hair.

她的眼泪可能是由玻璃制成但她的头发用的是真发。

But it won't measure up for hero wigs, which require real human hair.

但它不符合制作英雄角色假发的标准，英雄角色的假发需要真人头发。

The speck of paint in the imaging study is about the thickness of a human hair.

成像研究中的油漆斑点大约有一根头发的厚度。