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- As a result, the dredge was suggested to be ues to serious polluted river so that the most serious polluted layer could be apart from upper water of river. 由此认为，对于底泥污染严重的河流，疏浚是必不可少的，其目的在于清除或隔绝黑色富集层对上覆河水的二次污染。
- On-site Measurement of Pollution Layer Conductivity for Suspension Insulators 绝缘子污秽度现场测试技术研究
- The research indicates that the modern sediment is divided three layers: polluted layer,transition zone and unpolluted layer.Just the pollute layer cause Dianchi Lake environmental pollution. 研究结果表明：滇池现代沉积物主要分为三层，污染层、过渡层和未污染的湖泊沉积层，其中污染层是对滇池环境污染造成影响的层位；
- We should use anthracite to avoid air pollution. 我们应该使用无烟煤以防止空气污染。
- The pollution had destroyed ozone layer and caused many changes in weather. 污染破坏了臭氧层，并引起了许多天气变化。
- Pollution control has cleared the air. 污染管制已净化了空气。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- 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。
- The inner layer of the wall of a spore. 孢子内壁孢子壁的内层
- There is a fine layer of dust on the desk. 桌子上有一层薄薄的尘土。
- 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。
- 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。
- Pollution has stripped the trees of their foliage. 污染剥光了这些树的叶子。
- The middle, usually fleshy layer of a fruit wall. 中果皮果皮中间通常含肉较多的那一层
- We have freed the lake from pollution. 我们已经清除了该湖的污染。
- The bottom layer is a mixture of sand and clay. 最下面的一层是沙和泥的混合物。
- A fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- A layer, as of doubled-over cloth or of paperboard. 一层一层，如折叠过的布料或纸板的
