扬尘的英文：
dust emission

参考例句：

The motor car disappeared in eddy of dust.
汽车在一片扬尘的涡流中不见了。

dust是什么意思：
n. 尘土；粉尘
v. 擦灰；掸去；撒

dusted the cookies with sugar;dust crops with fertilizer.
将饼撒上糖粉；把化肥撒在作物上

Dust sugar on to a cake.
将糖撒在糕点上。

The carriage left a trail of dust.
马车后扬起了一缕烟尘。

He dusted his trousers.
他掸掉裤子上的尘土。

She dusts every day.
她每天掸灰尘。

emission是什么意思：
n. 散发，发射，发出；放射物

No records of emissions and discharge compliance.
没有关于排放的符合法规的记录。

microwave amplification by stimulated emission ofradiation
微波受激发射放大

The missionary transmitted emission emitted lately.
传教士传播了新近散发出来的散发物。

The company has pledged to control particulate emissions.
该公司已经承诺控制粒子排放物。

The emission of light from a phosphor after removal of excitation.
余辉激振停止后的磷光物质所发出的光