它是没有单位的，是一个数，一个很直接的数。

It is unitless. It's a number. Straight number.

youdao

这是一个数没有因子，是有单位的。

This is a number, there's no pre-factor here that has units.

youdao

这是一个数没有因子，是有单位的。

This is a number, there's no pre-factor here that has units.

youdao