It is speculated that particles mainly come from transport and ground dust.
推测颗粒物的主要来源为交通运输和地面扬尘。
The crew went there to hunt for dark dust-devil tracks on the ground.
全体研究人员前往该处寻找地面上的深色尘暴痕迹。
With the dust type ground to automatically determine the size of the vacuum suction ability.
其吸尘能力能随着地面的尘型自动确定吸力的大小。
Ground, with his face in the dust.
地面，与他的在尘土的面孔。
The man rose from the ground, beating the dust off his clothes.
那个男子从地上站了起来，拍掉衣服上的尘土。(分词动作后于谓语动作)。
The surface dust, low humidity of the air, ground and traffic dust stirred up.
地面灰尘大，空气湿度低，地面的人和车流使灰尘搅动起来。
The wall came crashing to the ground in a cloud of dust.
墙轰地一声坍了下来，扬起一片尘土。
And to the ground more air dust, and vulnerable to the crawler, mice, pet damage.
而且贴近地面的空气多尘土，也容易受到爬虫、老鼠、宠物的侵害。
地面除尘专家！
The dust falls to the ground as a fine powder.
这些尘埃就像一种好的粉末落在土地上。
Dust from the ground is blown into the sky. and becomes part of the clouds.
空中上的灰尘被吹到空中时，它便成了云的一部门。
Dust from the ground is blown into the sky. and becomes part of the clouds.
空中上的灰尘被吹到空中时，它便成了云的一部门。
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