11.There's a mound of business letters on my desk for me to deal with. (喻)
我办公桌放了大堆商务信函要我处理。
12.The explorers climbed a mound to survey the land around them.
勘探者爬土丘去勘测周围土地。
13.Villagers in the Mexican state of Veracruz discovered the tablet sometime before 1999, while quarrying an ancient Olmec mound for road-building material.