rough grade
... 四级结构 quaternary structure; 四级精度 rough grade; 四级考试 Band Four Test; ...
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对于IKONOS高分辨率融合影像，人机交互目视解译是一个最佳方法，森林四级类型的目视解译面积精度可达97.60%。
As to the IKONOS image, the human - computer interaction interpretation is most effective, the area relative precision of which can be up to 97.60%.
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