And that's what we found out. It turned out that every once in a while there are dust devils which come by on Mars, as you are seeing here, and when the dust devil comes over the Rover, it just cleans it up.
这是我们发现的。后来证明偶尔会有 尘旋风刮过火星，如你所见， 尘旋风刮过火星车后，火星车上的尘土就被吹干净了。