沙丘在阳光下闪闪发光。

The ___dunes glisten under the sun.

沙漠中的沙丘随风不断改变形状。

The ___dunes in the desert constantly change shape with the wind.

风吹过麦田，形成了金色的沙丘。

The wind blew across the wheat field, creating golden ___dunes.