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- 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。
- EXPERIMENTAL INVERSTIGATION OF IMPACT WAY OF SCOURING AND SUSPENDING OF RIVER BOTTOM SEDIMENT ON WATER QUALITY 河流底泥冲刷悬浮对水质影响途径的实验研究
- river bottom sediment 河底沉积
- 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。
- 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。
- 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;
- 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。
- In addition to polychlorinated biphenyls (PCBs)、the river bottom is polluted with low-level radioactive material、heavy metals and other chemicals. 除了多氯联苯之外,阿什塔比拉河底的污染物还包括了低放射性物质、重金属和其他化学制品。
- Its tongue sports a bright-red worm-shaped piece of flesh that when displayed by a motionless turtle on a river bottom draws curious fish or frogs close enough to be snatched. 它的舌头变异成亮红色,象肥美的爬虫。当一动不动的大鳄龟在河底展示它的舌头时,总能将好奇的鱼儿和青蛙吸引到可以捕猎的距离。
- 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。
- The river bottom shelves here. 河底从这里呈缓坡倾斜。
- This equipment is mainly used for measuring bulk density of fluid mud on river bottom and deriving the profile of bulk density with depth,and so it can be judged whether water way dredging needs to be done. 该仪器主要在航道部门用于测定江河水底淤泥重度随深度的变化规律 ,从而判断是否需要对航道进行挖泥疏浚 ,以保证航道畅通。
- "Each creature in its own manner clung tightly to the twigs ans rocks of the river bottom, for clinging was their way of life, and resisting the current what each had learned from birth. "每一个生物都以他自己的方式紧紧地附在河底的小细枝或者石头上;紧紧地粘附是他们生存的方式;从他们一出生就学到了要抵制住流水.
- There were some four hundred thousand of these Shantung farmers cultivating eight hundred thousand acres of land in what had once been river bottom - and most of them lived in Communist areas. 约有四十万山东农民在这里耕种着八十万英亩曾经是黄河河底的土地。他们中间的大多数人住在共产党的地区里。
- bottom sediment (settling) and water 底部残渣与水
- The rolling foothill country of north Georgia was ploughed in a million curves to keep the rich earth from washing down into the river bottoms. 北乔治亚的山麓区域,地势迤逦而下,所以被开作无数的曲线,以免那肥沃的泥土被冲进河底里去。
- sea bottom sediment characteristics 海底沉积特征
- Of plains and hills and river bottoms in areas of low rainfall east of the Rocky Mountains. 产于洛矶山脉东部少雨地区的平原、山地和河床。