gradients

例句:

• The courses are long and punishing, with steep gradients.
  这些赛道既长又有陡坡，极具挑战性。
  
• Across geographic gradients, Levins expects allopatric races or coenospecies exist.
  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.
  
• And the evidence is that the differences in status cause these " gradients "
  这是一种明显的情况,即地位的差异导致了这种 “ 梯度变化 ”
  
• Slopes with gradients up to about 18s.
  来自F. Hoyle
• Photons travelling between different gravitational gradients change their energies, not speed.
  来自SA
• There is no reason in principle why steeper gradients could not be tackled.
  来自SA