穿过地理梯度, 莱文斯预料有分布区不重叠的小种或近群种.Across geographic gradients, Levins expects allopatric races or coenospecies exist.航空磁梯度仪在六十年代中期交付使用.The airborne magnetic gradiometer came into use in the middle 1960 s.这说明水动力条件具有很明显的位能梯度.Thi...
Is the Pearl River Delta economic circle in the oasis.也是珠江三角洲经济圈中的绿洲.Computer simulation of water movement and heat transfer in groundwater - soil - vegetation - atmosphere continuum at oasis - desert ecotone.绿洲 - 荒漠交错带潜...
A lawyer for the disgraced financier Bernard L. Madoff told a federal judge on Tuesday that Mr. Madoff was expected to plead guilty later this week to charges that could result in his spending the rest of his life in pri...