1.There is a mound of papers on my desk.

1.在我的办公桌上有一大文件。

2.We had mounds of tasteless rice.

2.我们有的淡而无味的米饭。

3.Villagers in the Mexican state of Veracruz discovered the tablet sometime before 1999, while quarrying an ancient Olmec mound for road-building material.

3.在1999 年前某时, 村民在墨西哥韦拉克发现了石板，当时为了路面建筑，挖掘一个古老的奥尔梅克丘冢进行采石。