例句

A micrometer is one thousandth of one millimeter.

一微米是一毫米的千分之一。

On average these mosses grow at the glacial speed of 1 millimeter per year—and some of the turfs are meters thick.

平均来说,这些苔藓以每年大约1毫米的极慢速度生长,而某些草皮有数米厚。