Water droplets in fog are very small, typically between 1 to 50 microns (one-millionth of a metre) across.

雾气中的水滴极小，通常在1 - 50微米(一百万分之一米)之间。

youdao

The technology is producing cells that are often only two microns thick (a micron is one-millionth of a meter).

这项技术制造的电池厚度通常仅仅是两微米(一微米是一个百万分之一米)。

youdao

So it's much more common to see microfarads (one-millionth of a farad) and even picofarads (one-millionth of a microfarad).

所以微法拉（百万份之一法拉）和皮法拉（百万份之一微法拉）更为常见。

youdao

On Dec. 7, the company announced that Boost had signed up its one-millionth customer.

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In its earnings release, Apple promised to sell its one-millionth iPhone by the end of the current quarter.

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They did not merge with you, or give you any cell membranes or nutrients just an infinitesimally small packet of DNA, less than one-millionth of your mass.

FORBES: Biologist Asserts Your Life Began...Before Fertilization.