If you search in the dictionary, pure refers to things that are free of dirt or pollution, that have a uniform composition, that are complete and sinless.
如果你翻查一下字典，会发现“纯”这个词是指干净没有被污染过的，成分单一的，完善和清白的。
Results show it has such advantages as rapid blackening, uniform colour, good corrosion resistance, no pollution and low cost.
研究结果表明，该工艺具有发黑速度快、色泽均匀、防腐蚀性好、不耗能、无环境污染、成本低廉等特点。
Rather than a regulatory system with uniform effluent limitations, it may be preferable to have a variable standard that would concentrate pollution abatement where it costs the least.
制定各种各样的花费成本最少而又达到减污效果最佳的可变标准或许是最好标准，而不是统一的污染限制管制体制。
应用推荐