The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and aft er management of small watershed in gully region of the loess plateau.
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
Green is the main tone of my design. Fore figures come from large to small, near to far, and light to dark.
绿色是环保设计的主调，四个图案由大到小，由近到远，有浅到深。
The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and after management of small watershed in gully region of the loess plateau.
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
These smaller groups effectively formed genetic bottlenecks, small gene pools in which chance mutations such as red hair were able to come to the fore.
这些小群体有效构成了遗传瓶颈，微型基因库里面的偶发变异，如红发，便涌现了出来。
The variation of water and sand is studied under the influence of the rainfall and human activity, in the fore and after management of small watershed in gully region of the loess plateau.
以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The variation of water and sand is studied under the influence of the rainfall and human activity, in the fore and after management of small watershed in gully region of the loess plateau.
以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
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