虽然林地的面积可以从卫星照片计算出来，但是那只给一种大部分长在那儿植物的模糊概念。
Although a woodland's area can be worked out from satellite photographs, that gives only a hazy idea of the mass of the plants growing there.
照片展上显示，美索不达米亚湿地原本的面积比 照片展所在的诺福克郡霍尔特大三倍多。
The Mesopotamian marshes originally made up an area more than three times the size of Norfolk, where the exhibition is showing, in Holt.
这颗慧星的照片揭示了一种螺旋型的队列，由这颗慧星的其他时期内的时间和面积编成。
Photographs of this comet reveal a spiral formation at times and a square in the comet at other times.
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