Natural sources can include windblown dust, and soot from wild fires.

天然来源可以包括风沙、烟尘从森林大火。

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NEMA 3 - Outdoor use with some protection against windblown dust, rain or sleet.

符合NEMA 3—室外，具有一些针对扬尘，雨或雨夹雪的保护利用。

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The windblown dust from the Loess Plateau, along with a layer of local coal dust, had settled on her shoes.

风带来了黄土高坡的尘土，掺杂着一层当地的煤粉，落在了她的鞋上。

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" Red residue clinging to the scoop walls is from a sample collected earlier from a drift of windblown dust and sand called "Rocknest.

FORBES: First Curiosity Drilling Sample in the Scoop