You're right. It's dirty from all the dust and sand blowing around in the wind.

对啊。一刮风，就有很多尘土和沙子，太脏了。

youdao

The sources of sand-dust during sand blowing weather mainly come from Beijing outskirts.

沙尘天气分沙尘暴、扬沙、浮尘三种，北京扬沙天气的沙尘源以就地起沙为主。

youdao

But I am treated like a mineral, a bit of sand blowing about with no sense of you and no knowledge of myself.

但我的待遇像矿物，在风中飘荡的一粒沙子，既没感觉到祢也没觉察到我自己。

youdao

To keep the sand from blowing away, most courses rake three or four gallons of vegetable oil into each green once or twice a year. (Not too long ago, they used motor oil.) Sand greens are about one-third the speed of grass, but the oil quickens them up a bit, too.

WSJ: Sand-Greens Golf: A Game Lives On in the Great Plains

Conditions at the desert circuit can be pretty interesting with gusts of winds often blowing sand and grit onto the circuit.

BBC: LATEST NEWS (all times BST)

The four hour drive south from Marrakech winds through the Atlas mountains and tiny, dusty Berber villages (although many, surprisingly, not too tiny for an ATM) showered with blowing red sand under a blinding sun.

FORBES: Dar Ahlam- Pure Fantasy In The Moroccan Desert