种树:plant trees

Examples:

1. 四月是种树的时候。

April is the time to plant trees.

2. 我们在春天种花种树。

We plant trees and flowers in spring.

3. 这种树木可见于平原。

Such trees can be found in the plains.

4. 种树前，我们先用铁锹挖了些坑。

We dig some pits with a spade before planting the trees.