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n.（河流）上游源頭...

headwaters的音標(biāo)：headwaters的英式發(fā)音音標(biāo)為：['hedw?:t?z]headwaters的美式發(fā)音音標(biāo)為：['hedw?t?rz]...

n.源頭，上游，水源，河源...

For controlling source pollution from the sources, sloping land management in the headwater regions is necessary.為了從源頭上控制農(nóng)業(yè)面源污染,必須根據(jù)土壤生物熱力學(xué)原理,以土壤為中心, 大力治理坡地.In arid climates, surface water is generally better than water ...

headwater的音標(biāo)：headwater的英式發(fā)音音標(biāo)為：['hedw?:t?(r)]headwater的美式發(fā)音音標(biāo)為：['hedw?t?(r)]...