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)
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)