It's difficult to understand his explanation.

This river is very long and extensive, and it meanders like a snake when viewed on a map.

The great length and extent of this river cannot be understood on a map.

Please put the book on the shelf above.

In addition, he can play the piano.

It's difficult to understand his explanation.

While looking at the map, we planned our travel route.

We often have picnics by the river on weekends.

We often have picnics by the river on weekends.

We have a picnic by the river every weekend.