Ghana is one of the African countries well-endowed with water resources with the total actual renewable water resources ......

众所周知,东亚和南亚承载着地球上一半以上的人口.最新进展显示目前该地区国家(中国、印度尼西亚、菲律宾、泰国、越南、印度、巴......

Forest cover change in the mountainous region is driven by a variety of anthropogenic and natural factors.The Hindu Kush......

Two species of marine phytoplankton,Platymonas helgolandicavar. tsingtaoensis andHeterosigma akashiwo, were cul-tivated ......