长期变化

• Long - term change in rainfall is a factor for consideration in the planning of disaster mitigation
  雨量的长期变化，是防灾策划的一个考虑因素。
• Three - dimensional distribution of geomagnetic energy in the earth ' s interior and its secular variations
  地磁场能量在地球内部的三维分布及其长期变化
• Linear trend and abrupt change of sea ice in arctic and antarctic withits relation to atmospheric circulation
  北极海冰的长期变化趋势及其与大气环流的联系