英语语法分析

which is dimensionless, we call that strain.

它是无量纲的，我们称之为拉力。

Dimensionless quantities in physics are those that require no unit .

物理学中无量纲的量就是不需要单位的量。

This is a dimensionless number because it's length divided by length.

这儿没有量纲，因为是长度除以长度。