湿地水文特征演变会使湿地生态系统特征发生变化。
The evolution of wetland hydrological characteristics would change the characteristics of a wetland ecosystem.
人口文化外延则是人口变动、人口结构和人口特征演变的基本领域。
The extention of population culture includes population change, population structure and population feature.
凝结潜热、水汽对低涡的形成不具有决定性影响，但对低涡的维持以及结构特征演变起关键作用；
The latent heat of condensation and the water vapor don't play decisive roles in formation of the vortex, but play key roles in vortex maintenance and structure characteristics evolvement.
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