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- Benthos The organisms that live on the bottom sediments of freshwater and marine ecosystems. They include plants and algae (phytobenthos) that grow below low tide mark. 底栖生物（海底生物）：在淡水或海洋生态系统底部生活的生物体。包括一些水底的植物和藻类。
- The results of the determination indicate that DDT and BHC (benzone hexachloride) were present to varying degrees in water, bottom sediments, bodies of or... 测定结果表明,南极长城站邻近海域的水质、底质和生物体以及冰雪中都不同程度地存在着DDT和六六六。
- Bering Sea bottom sediment layer formed mainly by land-based sources of material. 在阿拉斯加陆架上向北流动的海流，一部分流入北冰洋；
- This article, by means of biological toxicity tests, analyzes the feature of the bottom Sediment poison pollution in the Dashahe River. 运用生物毒性监测方法,对深圳市南山区大沙河底泥毒物污染特征进行了分析。
- Besides, this article, with chemistry monitoring means, analyzes that the poison in the bottom sediment is mostly organic matter. 文章还结合化学监测方法,分析了大沙河底泥毒物主要为有机毒物。
- Heavy metal pollution in bottom sediment of abandoned Yellow River was assessed by using geo-accumulation index and potential ecological risk index. 潜在生态指数法评价结果表明,故黄河底泥内重金属污染对生态的潜在危害很轻。
- We used different methods to pre-treat specific gravity of seafloor bottom sediments in the Dongsha Islands in order to study influence of salt, carbonate and organic matter in the sediments on the specific gravity. 通过采用不同方法对东沙底质沉积物进行了土粒相对密度分析前处理,以探讨东沙底质沉积物中可溶盐、碳酸盐和有机质对其土粒相对密度的影响。
- The Congo's freshwater elephant fish, such as the one seen above, use their long snouts to sift through river bottom sediments for food--another example of the Congo as a hotbed of evolution. 如上图所看到的刚果河中的淡水象鼻鱼，通过它们的长鼻子过滤河底的沉积物来发现食物。这是刚果河物种多样性进化温床的另一例证。
- Some key technologies of bottom sediment dredging were summarized, and recommendations were made based on the introduction and analysis of the application and remediation of dredging. 摘要总结了底泥生态疏浚的一些关键技术，介绍国内外研究应用的概况并对修复效果进行分析，针对生态疏浚的不足提出建议。
- It is shown from the research results that this method can be used to classify different bottom sediment types,recognize the unknown bottom sediment types and classify the mixtur... 研究结果表明,该方法可以对不同的底质类型进行分类,可以识别未知的底质类型以及对混合在一起的两种不同类型的目标进行分类。
- Some key technologies of bottom sediment dredging were summarized,and recommendations were made based on the introduction and analysis of the application and remediation of dredging. 总结了底泥生态疏浚的一些关键技术,介绍国内外研究应用的概况并对修复效果进行分析,针对生态疏浚的不足提出建议。
- bottom sediment (settling) and water 底部残渣与水
- sea bottom sediment characteristics 海底沉积特征
- bottom sediment ( settling ) and water 底部残渣与水
- bottom sediment settling and water 底部残渣与水
- They sent the enemy ship to the bottom of the sea. 他们把敌舰击沉。
- The child was sitting on the bottom stair. 那孩子正坐在楼梯最下面的一级上。
- I intend to get to the bottom of it. 这件事我打算寻根究底。
- He was always bottom of the class in maths. 他的数学成绩在班上总是垫底。
- The dregs have settled at the bottom of the bottle. 渣滓都沉到瓶底了。
