The principles of ecology are used to analyse physical properties of soils in shrub forests, hydrolic benefits and drought resistances thereby to conclude…
利用生态学原理对灌木林的土壤物理性状、水文效益、抗旱性能进行分析研究，得出在干旱瘠薄山地灌木资源的扩大利用有广阔的前景。
They're pretty close to the ground, but these warblers also nest in forests that have low shrub density.
它们离地面很近，但是这些蓝莺也会在灌木密度低的森林里面筑巢。
So they're pretty close to the ground, but these warblers also nest in forests that have low shrub density.
所以，它们倾向于接近地面，但是这些蓝莺也会在有着稀疏灌木丛的森林里面筑巢。
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