The hills flatten out here, and the ground is almost level.
这里的山丘变平了，地面基本上是平坦的。
For example if a rubber ball bounces and hits the ground it will tend to flatten when it hits.
比如一个橡皮球弹跳后落到地面时身体会被压扁。
For example if a rubber ball bounces and hits the ground it will tend to flatten when it hits.
比如一个橡皮球弹跳后落到地面时身体会被压扁。
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