The results show that in the same H & A, with depth of soil increasing, contents of organic matter(OM), NO-3-N, available phosphor(AP) and urease decreased respectively.
结果表明，对于同一封育年限的油松林地，土壤有机质、硝态氮、速效磷和脲酶含量随采样深度增加而减小；
Secondly, we define the rate control problem in details and give an in-depth analysis of the difficulties in rate control for H. 264/SVC.
然后，我们对码率控制问题作了详细的定义并深入分析了H.264/SVC码率控制的技术难点。
Secondly, we define the rate control problem in details and give an in-depth analysis of the difficulties in rate control for H. 264/SVC.
然后，我们对码率控制问题作了详细的定义并深入分析了H.264/SVC码率控制的技术难点。
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