研究结果显示，群体密度过高或过低都不利于形成理想群体冠层和获得高产。
The experiment results indicated that both exorbitant density and too lower density of colony density are all not avail to forming ideal canopy structure and taking high yield.
在密度和组成方面，这两个群体有显著的不同。
Other dimensions along which the two groups differ markedly are density and composition.
而那些只食用低脂食品的群体与一般人相比，低密度脂蛋白量仅仅降低了8%。
And people who only take low fat food only had lowered LDL by 8% comparing with normal group.
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