空气负离子浓度与空气环境质量密切相关。
Air negative charge ion concentration (ANCIC) has a close relationship with air quality.
空气中负氧离子浓度是空气清新与否的标志。
The air negative oxygen ion concentration is the sign of fresh air or not.
第二，什么是有害金属离子血清浓度标准？
离子初始质量浓度对树脂材料的吸附率影响不大。
The original ion concentration has less impact on adsorption rate.
离子初始质量浓度对树脂材料的吸附率影响不大。
The original ion concentration has less impact on adsorption rate.
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