Sometimes they are also called sand seas because the dunes look and act like very slowly moving ocean waves.

有的时候它们也叫做沙海域因为沙丘看来举止像非常缓慢移动的海浪。

youdao

The lines of wind-sculpted sand are characteristic of immense sand deserts, or sand seas, and the Rub' al Khali is the largest desert of this type in the world.

在一些广袤的沙漠或沙海里常常有这种被风雕刻的痕迹，而鲁卜哈利沙漠是这类沙漠中面积最大的。

youdao

In marked contrast to the mountains, sand seas line the southeastern and northern perimeters of the lake, and marshes occur along the lake shores in Azerbaijan to the west.

与山脉形成鲜明对比的是，沙漠紧贴着湖的东南部和北部边缘，西部位于阿塞拜疆境内的湖滨则遍布沼泽。

youdao