琅岐岛综合土地利用年变率为1.90%，土地垦殖率呈快速下降趋势，林地覆盖率和建设用地利用率呈增加趋势；

The annual change rate of comprehensive land use was 190%, the cultivation rate decreased rapidly, while the forest coverage and the construction land use rate increased.

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根据保存这些化石的岩石层里铀衰变率的基础上所确定的年代，那次掉入洞穴事件发生在197.7万年前。

That fall into the cave happened 1.977 million years ago, according to dating based on the rate of decay of uranium in the rock layer that holds the fossils.

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湖中部表面能量平衡和温度的年际和季节变率。

Interannual and seasonal variability of the surface energy balance and temperature of central great slave lake.

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