- impurity level
- 不: a block of wood
- 纯度: fineness; pureness; purity; ...
- 种子不纯度: impurity of seed
- 不纯: impureness; impurity
- 纯度: fineness; pureness; purity; purity quotient; rate of purity 保持适当的空气纯度 maintain proper air purity; 纯度百分率 percentage purity; 纯度标准 purity rubric; 纯度试验 purity test
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