the distance from one side to another

The length of this box is twice its breadth. 这个箱子的长度是其宽度的两倍。

the fact of including many different things, features, subjects, or qualities

The breadth of her knowledge is amazing. 她知识渊博，令人惊讶。

He showed an astonishing breadth of learning for one so young. 他年纪轻轻就显示出宽广的知识面，很令人吃惊。