The winds keep blowing the fine sand away, continually eroding them.

风 不断吹走细沙使得沙山很难维持。

And what the heck causes those massive clouds of blowing desert sand anyway?

到底是什么原因引起了这些巨大的沙漠飞沙云团？

The horsetail twistings of blow sand could be seen against the dark of the sky.

在漆黑的天空下，可以看到扬起的沙子呈马尾状扭曲。

Eight million years ago, super strong winds blew sand and dust here.

八百万年前超级大风将沙尘吹到这里。

743. We have observed blowing sand in the vicinity of the airport.

743. 我们观察到机场附近有扬沙。

The Sea-Wood of Graden had been planted to shelter the cultivated fields behind, and check the encroachments of the blowing sand.

格拉丁海木被种下是为了遮蔽后面的耕地，并阻止风沙的侵蚀。

The wind is clearly blowing sand off the top of the dune, but as long as the wind from upstream keeps depositing more sand at the top than gets blown away, the dune won't shrink.

显然风把沙子从沙丘顶部吹走，但是只要来自上游的风在沙丘顶部沉积的沙子比被吹走的沙子多，沙丘就不会缩小。