The spraying of SFNS could improve the quality of farm product, promote the absorption and utilization of NPK and decrease the nitrate content in farm product.

使用专用叶面营养液具有改善农产品品质，提高养分吸收利用，降低硝酸盐的效果。

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So, when WPSX took the plunge into SFNs, it opted for option two, distributed transmission.

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If State College, Pennsylvania?s WPSX is a harbinger of things to come, the answer to your woes just might be Single-Frequency networks (SFNs).

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More commonly discussed within the context of Europe?s COFDM, SFNs are beginning to show signs that they might just work with America?s 8-VSB modulation scheme also.

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