查询词典 areal

We consider suburban areas in terms of population density and of apparent spectral reflectance using Landsat data and quantify the relationship between the two variables. We also compare these results with the USGS National Land Cover Dataset (National Land Cover Characterization, 2001). We selected the Low Intensity Residential, High Intensity Residential and Commercial/Industrial/Transportation classes and crossreferenced the areal extents for these classes with vegetation fractions and urban classification estimates for the six cities included in this study.

我们从人口密度方面和利用美国地球资源探测卫星数据的表现光谱反射比与确定两变量间的关系来考虑郊区，另外，为了对该研究中的六个城市做出评价，我们将这些探测研究结果与美国地质勘探局的国家地表的一套数据(2001国家地表特点)相比，收集低密度住宅，高密度住宅，商业工业运输的分类，通过植被区与城市分类交叉引用这些来自同一地区的廷区。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。