我们在小土丘上野餐，俯瞰整个山谷。

We had a picnic on the ___mounds, overlooking the entire valley.

孩子们在后院堆了几个小土堆玩耍。

The kids made small ___mounds of dirt to play with in the backyard.

投手站在投手丘上准备投球。

The pitcher stood firmly on the ___mounds before throwing the ball.