on the side of和by the side of有什么区别

on the side of释义：

拥护…；站在…一边；赞助

例句：

She sat on the side of the bed.

她坐在床边。

by the side of释义：

在...附近；和...在一起比较

例句：

Overlooking the valley the uncle had made himself a bench, by the side of the hut.

老头儿在小屋旁边给自己做了一条长凳，俯瞰着山谷。