Take Xiangxi Bay of Three Gorges reservoir as a case,optimal management for point sources of phosphorus emission was per......

Background: Thailand has legislation restricting smoking in outdoor areas like open markets,parks and bus stops but not ......

结合案例分析研究，通过模型计算确定排污交易量，分析排污交易所取得的环境效益、社会效益和经济效益，较全面地阐述了河网地区点源排污......

本文通过对超高能γ射线与太阳系周围的氢云的红外辐射相互作用的讨论，说明考虑到氢云的不均匀性，如果氢云的红外辐射温度有３０Ｋ左右，氢云......