Scientists have known for a long time that aerosols such as soot, dust and other small particulate matter, alter clouddensity and the radiative balance of the atmosphere.
科学家们很早之前就发现，诸如煤烟、灰尘和其他细小的微粒，能改变云体的密度及大气的辐射平衡。
2
It gets the intentionally conclusions from analysing the accuracy of point cloud data with the different filtering methods, the different point clouddensity, the different terrain conditions.
最终结果便是以上述不同滤波方法、不同点云密度、不同地形条件的组合进行分析，并得出有意的结论。
3
The daytime quality of light in forests varies with the density of the vegetation, the angle of the Sun, and the amount of cloud in the sky.