由福建省2001—2006年营运汽车数量的变化和福建省公路总里程的增加及公路密度的增长情况入手，根据欧Ⅰ和欧Ⅱ排放标准估算出2006年营运汽车排放的尾气总量。
We present the change of business vehicle numbers in Fujian during 2001 and 2006, together with the increase of total highway mileage and highway density in the same period.
它可以实现所需的交通密度，高速公路主线，并能使车辆行驶更安全、更安全。
It can achieve a desired traffic density along the mainline of a freeway, and can make vehicles travel more efficiently and safely.
写定义交通密度，哪里是公路段的长度。方程(1)现在可以用密度来书。
Define traffic density as, where is length of the road segment. Equation (1) can now be written in terms of density.
适用于公路、纺织行业，对样品进行密度测试。
Widely used in road, textile industrial, to sample proceed density test.
但样本县因人口密度过小、耕地生产率低下等因素限制了对公路运输的有效需求。
But factors such as low population intensity and low land productivity restrict the efficient demand for road transport.
以外力地质作用、困难度指数和地表切割密度作为公路地貌二级区划的主导指标；
Based on those works, the index system of landform regionalization of highway in China was developed.
以外力地质作用、困难度指数和地表切割密度作为公路地貌二级区划的主导指标；
Based on those works, the index system of landform regionalization of highway in China was developed.
应用推荐