river beach

例句：

1. 1. The river flows through the city and provides a natural boundary.
   这条河流穿过城市，提供了自然的边界。
2. 2. The beach is perfect for swimming and sunbathing.
   海滩非常适合游泳和晒太阳。
3. 3. The river has been diverted to provide water for the nearby cities.
   这条河被改道，为附近的城市提供水源。