The family size biogas tanks were built in the study site. Their effects were monitored.

在研究现场兴建了一批户用沼气池，在沼气池的进口和出口监测处理效果。

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They divided the study site into discrete areas and allowed different amounts of animal grazing on each.

他们把研究站点划分为向个离散的区域，并且让不同的数量的动物上在此牧草。

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The antibiotics were detected in 58.3% of urine samples overall, and this detection frequency reached at 74.4% in one study site.

全部样本中的58.3%检测到了抗生素，而其中一个地域的样本的抗生素检出率达到了74.4%。

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The study found that about fourteen percent of those receiving the e-mail removed sexual behavior information from their site.

VOA: special.2009.02.03

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