“scattered trees”造句，怎麼用scattered trees造句

There are scattered trees on the hillside.

Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees or shrubs.

As they travel inland at speeds in excess of 60 feet a year, they merge with the rich grass and scattered trees of the savanna.

On the one hand, again, a world with scattered trees is different from one where they're collected into forests; but on the other, what exactly is a forest over and above its trees?