1微秒就是一百万分之一秒。

A microsecond is a millionth of a second.

youdao

每个电波脉冲群仅持续约一百万分之一秒的时间。

Each burst of waves lasts only about a millionth of a second.

youdao

没错，一微米是一百万分之一米，人类头发的宽度大概是100微米。

To put that into some sort of perspective, a micro-metre is a millionth of a metre; the width of a human hair is about 100 micro-metres.

youdao