Why don't know, in the brain of small fox on moving, a no agreeable mind an Shan but guide, is it the surprised Yan Hong that went to a winds and smokes mainland?
不知道为什么，小狐的脑中一动，一个不好的念头一闪而过，难道是燕惊鸿去了风云大陆？
Based on comparative analysis on spatial temporal distribution characteristics of soil nutrients of typical dam land in Beigou small watershed of Yan 'an City.
通过对延安市北沟小流域典型坝地土壤养分的测定，分析比较了其土壤养分时空分布特征。
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