选on each side of ... 每一边.
否则on both sides of ...两边都.
all sides 指的是有许多条边的物体.
every 既考虑单个,又考虑整体. Every student in our class likes the teacher. 每个学生（所有）学生都喜欢.
each则只考虑单个. Each student has a pencil case. 每个人都有铅笔盒.（没有‘都’的意思）