covered-region 覆盖区
Cross- Covered Region 域划为交叉覆盖区
Cross-overlap-covered region 交叉重叠覆盖
covered karst region 覆盖型岩溶区
The information content and the covered region of digital libraries are unprecedented.
数字图书馆信息含量之大，覆盖地域之广是前所未有的。
This platform can simulate the ray tracing for a fixed frequency or sweeping frequencies, also can calculate the group path and the covered region of rays.
该平台可实现定频或扫频射线轨迹演示，计算各射线群路径，覆盖区域等功能。
Earlier this month, us scientists reported that annually forming sea in the Arctic region covered roughly the same area as in previous years, but had significantly thinned.
本月初，美国科学家报告，北极地区年度新生海域面积大致上与前几年相同，但明显变稀薄了些。
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