沙荒的英文：
sand dune area
sandy waste
sandy wasteland

sand是什么意思：
n. 沙；沙滩
v. 用砂纸磨光；撒沙于；被沙堵塞

They panned off the sand and dirt.
他们用淘金盘淘去砂泥。

Sift gold from sand.
沙里掏金。

Sand castle damages easily.
沙堡容易受到损坏。

dune是什么意思：
n. 沙丘

At some higher velocity the ripples or dunes disappear and the bed becomes flat
流速增大时，沙纹、沙垄消失，河床变平。

In the upper reach the bed was dune covered and in the lower reach it was flat
上游河段的床面为沙垄所覆盖，而下游河段则为平整床面。

Soundlessly the Sikorski circled the dunes, its fans driving the fine sand down the slopes.
这架西科尔斯基号直升飞机悄无声息地在沙丘上空盘旋，螺旋桨把细沙吹下了斜坡。

area是什么意思：
n. 面积；地区；区域；场地；领域，范围，方面

This is a drainage area.
这里是排水区。

The areas of greater rainfall conform roughly with these forested areas.
降雨量较大地区大致与这些森林地区相符合。

The?penalty area?is the rectangular area in front of the goal.
禁区就是指球门前的矩形区域。