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- A new biotic index, the species pollution value (SPV) and the community pollution value(CPV), based on chemical parameters is presented. 依据水质化学参数和原生动物群落参数建立了一种新的生物指数：种类污染值（SPV）和群落污染值（CPV）。
- And then the biological indicator methods, three diversity indexes(Simpson, Shannon-Weaner, Margalef )and the Species Pollution Value (SPY), the Community Pollution Value (CPV) were used to make the biological evaluation separately. 同时利用指示生物法、三种多样性指数：Simpson多样性指数、Shannon-Weaner多样性指数、Margalef多样性指数及种类污染值(SpeciesPollution Value，SPV)和群落污染值(Community Pollution Value，CPV)，分别对内河进行水质生物学评价。
- Our community is a leader in the conservation of wildlife. 我们社区在野生动物保护方面走在前头。
- We should use anthracite to avoid air pollution. 我们应该使用无烟煤以防止空气污染。
- Pollution control has cleared the air. 污染管制已净化了空气。
- Man is fighting a battle against pollution. 人类正在与污染作斗争。
- Pollution is still very much a live issue. 污染现象仍然是当前的大问题。
- He worked in community welfare department. 他在社会福利部工作。
- The soil becomes more and more acidic as pollution mounts up. 随着污染的加剧，土壤的酸化越来越严重。
- Here is a local Jewish community. 这是当地犹太人的一个社区。
- A clamor in the press for pollution control. 在报纸上对污染控制的呼吁
- Water pollution imperils all kinds of marine life. 水质污染危及所有海洋生物。
- A member of a convent or other religious community. 修道院住院修士修道院或其他宗教团体成员
- Pollution has stripped the trees of their foliage. 污染剥光了这些树的叶子。
- He is ill reputed in the business community. 他在商界名声不好。
- We have freed the lake from pollution. 我们已经清除了该湖的污染。
- Mrs. White is earnest about community work. 怀特太太对社区工作十分热心。
- We visited the Chinese community in San Francisco. 我们访问了旧金山的华人社区。
- The community's prime need is a new school. 这个社区的第一需要是一所新学校。
- He did it for the good of the community. 他为了公众的利益而做这件事。
