在河边用by还是beside

用by

by the river

在河边

我们在河边享受了一天垂钓之乐。

We enjoyed a day's fishing by the river.

2

我们在河边闲逛了一整天。

We spent the day messing around on the river.

3

孩子们在河边玩耍时，其中一个突然落水了。

The kids were playing by the river and one of them fell in.