It's a important link between the two cities on( )of the river.填each side还是both sides

each side of the river 每河边
both sides of the river 河的两岸
翻译一
It's a important link between the two cities on each side of the river这是两个城市之间的每河边的重要环节。
翻译二
It's a important link between the two cities on both sides of the river
这是两个城市之间的对河两岸的重要环节
应该选翻译二 both sides

both sides
强调河的两岸

each side
指分别在河两边的两座城市城市

这怎么能进C++分类呢？