施用有机复肥使小白菜和茶叶的硝酸盐含量下降，番茄的次果率减少而贮藏期延长。

Applying with organic-inorganic fertilizer made nitrate content of cabbage and tea decrease, tomato less inferior fruits and longer shelf life.

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影响能见度的空气污染因子，不仅包括一次源，还应包括经由气-粒转化化学反应而产生的硫酸盐、硝酸盐等二次污染粒子。

Air pollution factors include sulfate or nitrate second particles derived from gas-to-particle transformation as well as original particles.

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催化加氢还原硝酸盐生成氮气具有高效、无二次污染等特点，是一种应用前景良好的脱氮技术。

The catalytic hydrogenization process offers a practical approach to remove nitrate from water due to the high efficiency and the benefit free from secondary pollution.

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