We research on method of effective nitrogen protection in quick decomposition of straw in frigidarea, and provide feasible approach.
研究了北方寒冷地区秸秆的快速腐解过程中有效氮保护的方法，寻找切实可行的途径。
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He insisted on traveling with his tent too, including to Paris during a frigid winter, and he attempted and failed to set up a tent in the New York area on a trip to address the U.N. in 2009.