气溶胶在大气中随着纬度线由西向东易于扩散，但是将它们南北向传播则需要很多时间。
Aerosols disperse well in the atmosphere along the latitude lines as the winds blow west to east.But moving them north and south takes more time.
采取的措施是把排队车辆转移到道路宽阔且建筑物较矮的路段，使车辆尾气易于扩散。
The test involves simulation of diverting queuing vehicles to other roads that are wider and with lower buildings on both sides, so as to ease diffusing vehicular emissions.
稀土渗入钢基体和VC渗层，会增大晶体缺陷密度，使碳原子扩散易于进行。
Permeating of rare earths into steel and the VC layer increase the crystal fault density, and, together with its excellent chemical activation, makes carbon atoms diffuse easily.
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