1·A square has four sides.
正方形有四个边。
2·There are mountains on all sides [four sides].
四面都是山。
—— 《新英汉大辞典》
3·The square has four sides, and the circle has no sides.
正方形有四条边，而圆形没有边。
4·Each must have four sides, a toilet seat and toilet paper.
每个（户外厕所）都必须有四个面、一个马桶座圈和卫生纸。
5·A square has four sides and four corners.
正方形有四个边和四个角。
6·This shape has four sides all just the same.
这个形状只有四条相同的边。
7·On vinyl, it's four tracks each on four sides.
黑胶唱片的每一面都有四条音轨。
8·A square has four sides but a circle has no sides.
正方形有四条边，然而圆形没有边。
9·Then, I will expound and prove my point in four sides.
然后，我将阐述和证明我的观点在四个侧面。
10·A puzzle piece you can use on all four sides of a puzzle.
可用于拼图全部四个边的拼图块。