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

1.我办公桌上有一大堆文件。

2.We had mounds of tasteless rice.

2.我们有成堆成堆淡而米饭。

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

3.1999 年前某时, 村西哥韦拉克鲁斯省发现了石板，当时为了路面建筑，挖掘一个古老奥尔梅克丘冢进行采石。