让步 发表于 2025-3-26 23:12:54
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ism to surface properties. It is this richness of phenomena, together with its many important practical applications, which has made this subject such an active and fertile area of investigation for over forty years. Unfortunately this very diversity results in the lack of a completely coherent pres角斗士 发表于 2025-3-27 07:28:20
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http://reply.papertrans.cn/89/8833/883202/883202_38.pngCHART 发表于 2025-3-28 06:56:07
Protection of Marine and Freshwater Resources,nts and protocols. One resulting document, Agenda 21, included program actions for various natural resources to guide the international community in environmental management and sustainable development. Agenda 21 recognizes that human activities can affect physical, biological, and socioeconomic dim不满分子 发表于 2025-3-28 14:23:07
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