An average-sized bacterium is about 2 micrometers, or 2 millionths of a meter, in length.

平均大小的细菌长约为 2 微，即百万分二。

Nanoplastics are less than 1 micrometer in size.

纳塑料的尺寸小于 1 微。

These cracks are likely only micrometers long.

这些裂缝可能只有几微长。

A normal bacteria measures one to five micrometers long.

正常的细菌有1到5微长。

A micrometer is one millionth of a meter.

1微是百万分。

Microplastics can be 5 millimeters long at most or as small as one micrometer.

微塑料最长可达5毫，或小至1微。

To put this in perspective, a typical bacteria cell has a width of between 1-10 micrometers.

对比来看，个典型的细菌细胞的宽在1-10微间。

Their speed goes from eighteen point three micrometers per second up to a whopping thirty point one.

精子的速秒18.3微上升到30.1微。

Though the skin is made of many layers, its total thickness is less than a hundred micrometers.

虽然皮肤是由许多层组成的，但它的总厚不到100微。

Most fall between 0.02 and 0.4 micrometer in length, too small to be seen with normal microscopes!

大多数病毒的长在 0.02 到 0.4 微间，小到无法用普通显微镜观察到！

Rhizobia is a nitrogen-fixing bacteria up to 3 micrometers long and without it, that sort of agricultural production is impossible.

根瘤菌是种长达3微的固氮菌，没有它，不可能实现这种农业生产规模的。

Typical 3D printers create layers approximately 100 micrometers thick, but some high-end machines can print as small as 16 micrometers.

普通的3D打印机打印出来的层大约有100微厚，但些高端机器打印出来的层仅有16微厚。

You've entered the microscopic realm and are now less than 2 micrometers tall, about the size of an e coli bacteria.

你现在来到了微型王国，你的身高不足两微，和大肠杆菌的大小差不多。

That means you don't have to cool it down as fast, so the material can be thicker, centimeters instead of micrometers.

这也就意味着你不需要那么快降温，所以最后得到的材料变得厚了很多，可以达到几厘厚。

And its volume would be one cubic micrometer.

它的体积是立方微。

We're talking one, or two, or 300 micrometers.

我们说的是微， 或两微， 或300微。

This flour sieve has 300 micrometer mesh.

这个面粉筛有 300 微的网眼。

But our samples are only a couple hundred micrometers wide.

但是我们的样品只有几百微宽。

The distance for gas exchange is only about a half a micrometer.

气体交换的距离只有半微左右。

You know with rocket science, if you're off by one centimeter, by one micrometer, you can cause catastrophic failures to take place.

你知道，对于火箭科学来说，如果相差厘，微，就可能导致灾难性的故障发生。