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| Chinese | English |
| 不溶解性物质 | insoluble substance Substance incapable of forming a solution, especially in water (不能溶于溶液的物质，特别是指不溶于水。) |
| 溶解性有机碳 | dissolved organic carbon The fraction of total organic carbon (all carbon atoms covalently bonded in organic molecules) in water that passes through a 0.45 micron pore-diameter filter (水中全部有机碳(即所有碳原子以共价键联结成的有机分子)能通过0.45微米孔径滤纸所占的比例。) |