To determine the effect of negative air ions on the immunological function and their biological mechanisms, 132 healthy male mice were divided into 6 groups at random.

为探讨空气负离子对免疫功能的影响及其作用机理，用雄性小鼠132只，随机分为6组。

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The paper presented the function of negative oxygen ion, explained what the anion powder is and expound the principle in producing negative oxygen ions.

论述了负氧离子的保健功能和奇冰石复合粉产生负氧离子的原理。

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Its main Function is to distribute the fragrance, as well as negative ions, which will bring more fresh air to our life, and it's also on behalf of the modern city people's immediate needs.

它的主要功能是散发出香气以及负离子，给我们的生活带来更清新的空气，这也是现代都市里人们的切身需求。

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