小于

Angles of less than 90 degrees are called acute angles.

小于90度的角叫锐角。

He cannot be under thirty years of age.

他的年龄不会小于三十岁。

Such people often experience less stress than those in the ranks immediately below them.

这些人承受的压力往往小于那些职位仅次于他们的人。

In most machines friction consumes effort, with the result that less work is got out than is put in.

在大多数机器中，摩擦要消耗功， 以致造成输出的功要小于输入的功。

The distance between parallel cables is at least 0.2 m.

两根平行的传爆线间距离不小于0。2米。