These impurities if taken out can bring back the mental purity hence real spirit of joy of childhood can be attained up to an adequate level.

只有清除这些杂质才能回归精神纯洁，从而充分体会童年欢乐的真正含义。

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Purity Protection System saves fuel, reduces the level of deterioration, maintains cleanliness in the engine, increases productivity and inter-service interval.

纯度保护系统可以节省燃油、降低恶化水平、保持发动机清洁、提高生产力并延长服务间的间隔。

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The method is suitable for large-scale mutant bank screening as well as large mapping populations with characteristics of maintaining relatively high level of DNA purity and concentration.

该方法特别适用于精细作图群体和大型突变体库的筛选鉴定，不仅通量大、速度快，而且可以确保足够的DNA浓度和纯度。

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For example, in order to maintain the highest level of genetic purity, distinct varieties of self-pollinated crops such as wheat, rice, soybeans and barley need to be separated by at least 60 feet.

FORBES: Magazine Article