海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
在石膏层上方和下方的沉积物中含有许多小型海洋生物化石，这表明这里的海洋环境很开放。
Sediment above and below the gypsum layer contained tiny marine fossils, indicating open-ocean conditions.
世界上大多数的海洋沉积物不是含有浮游生物就是含有大量的蕨类孢子，但它们并不是同时存在于同一层中。
Most marine deposits from around the world contain either plankton or a lot of fern spores but not both together in the same layer.
在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。
The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.
根据一些科学家的观点，产自于天然椰油的生物柴油在发动机上不如普通柴油好用，并且脂肪酸沉积物最终会对发动机造成损害。
According to some scientists, the biodiesel produced from crude coconut oil may not run through engines as easily as diesel, and fatty-acid deposits can damage engines in the long run.
梅吉尔和他的同事希望能利用这种机器来研究海岸边的海洋生物，因为在这里，螺旋桨会激起较多沉积物，而且会跟水草缠绕在一起。
Megill and colleagues hope the bot can be used to study Marine life near the shore, where a propeller would kick up too much sediment or get tangled in weeds.
碳酸盐岩沉积物，特别是生物礁，只有在现代海洋动物群落和植物群落生态学详细资料的帮助下才能获得有益的研究成果。
Carbonate sediments, in general, and reefs, in particular, can only be studied profitably with the aid of a detailed knowledge of the ecology of modern Marine fauna and flora.
一些研究者认为，海低沉积物里的细菌是由微生物的纳米线网络连接起来的。
Some researchers believe that bacteria in ocean sediments are connected by a network of microbial nanowires.
珊瑚礁是由历代以浮游生物为食的小水螅所遗留下来的碳酸钙沉积物而形成的。
Coral reefs are formed by deposits of calcium carbonate left by successive generations of tiny polyps which feed off plankton.
这表明，轨道(遥感)探测(比如“亥伯龙号”)的方法可以用来探测木卫二非冰沉积物的化学成分，并可能从中发现地外微生物等生命迹象。
This means that an orbiting sensor like Hyperion could be used to identify chemicals in Europa's non-ice deposits that may be a sign of extraterrestrial microbial life.
海底生物群——生活在沉积物上和沉积物里的动物——构成了这个巨大的生态系统。
The benthos -- the animals living on and in the sediments -- populate this vast ecosystem.
当浅水区的蓝细菌和其它微生物生长的时候，一些沉积物沉积在上面，它们结合在一起形成岩石一样的小石塔和石丘，最后逐渐形成层状叠层石。
Cyanobacteria and other microorganisms build stromatolites in shallow water as they grow, gradually trapping and binding sediments into the small rock-like towers and mounds.
要确定气候变化是如何改变北极湖泊的这种生物地球化学循环系统，德莱夫尼克的研究小组分析了来自加拿大北极地区和挪威斯瓦尔·巴德9个湖泊的沉积物岩心样本。
To determine how climate change alters this biogeochemical cycle in Arctic lakes, Drevnick's team analyzed sediment cores from nine lakes in the Canadian Arctic and in Svalbard, Norway.
我国将继续开发风能、太阳能、生物燃料、水、地热和核能，并探索对自然沉积物、页岩及煤层气的利用。
The country will continue to develop wind, solar, biomass, water, geothermal and nuclear energy, as well as explore deposits natural, shale and coal bed gases.
我国将继续开发风能、太阳能、生物燃料、水、地热和核能，并探索对自然沉积物、页岩及煤层气的利用。
Thee country will continue to develop wind, solar, biomass, water, geothermal and nuclear energy, as well as explore deposits natural, shale and coal bed gases.
碳酸盐岩沉积物，特别是生物礁，只有在现代海洋动物群落和植物群落生态学详细资料的帮助下才能获得有益的研究成果。
Carbonate sediments, in general, and reefs, in particular, can only be studied profitably with the aid of a detailed knowledge of the ecology of modem Marine fauna and flora.
描述了淡水沉积物毒性的生物测试方法。
由于小型底栖生物的大小、比重等物理特性与沉积物颗粒接近，如何高精度地分离样品成为一个难题。
How to separating meiofauna accurately from sediments is an unfathomed problem, because meiofauna has the similar size and density with sediment granules.
该研究结果将对我国海洋底栖钩虾类的区系研究和沉积物毒性检验受试生物的选择和采集提供一定帮助。
The results may be helpful to understand the fauna of Gammaridea in Chinese sea and choice adaptive testing amphipods for sediment toxicity test.
一种含微体生物骨骼残余物至少30%的远洋沉积物。
A pelagic sediment containing at least 30 per cent skeletal remains of microorganisms.
硅藻土是几十万年前水生浮游类生物硅藻的沉积物，它的孔隙率在90%以上，是活性炭的5000倍。
For hundreds of thousands of years ago diatomite is floating creature of aquatic diatoms, it porosity of sediments at more than 90%, is 5000 times of the activated carbon.
为了解太湖入湖河道的营养状况，研究了太湖西部河流沉积物生物利用磷的组成与分布。
The fractions and distribution of bioavailable phosphorus in river sediments were studied in order to identify the trophic level of inflow rivers to the west of Taihu Lake.
从报道的研究结果看，沉积物细菌、共栖细菌和共生细菌是海洋微生物天然药物筛选的重要来源。
Summarizing the studies obtained, sediment, commensal, and symbiotic bacteria were more important in searching for nature pharmaceutics.
一切环境的碳酸盐沉积物，基本上都是古代生物化学体系的产物。
Carbonate sediments in all environments are basically products of an ancient biochemical system.
本文采用密闭罐微波消化方法快速分解生物、土壤、沉积物等环境样品。
A closed-vessel microwave digestion method is described for the rapid dissolution of soil, sediment and biological samples.
广西沿海主要岛屿区海滩沉积物分为砾质沉积、砂质沉积、生物碎屑沉积。
Seabeach sediment on the main island area of Guangxi coast can divided into gravelly, sandy, bioclastic deposition.
本文报道了广州市河涌沉积物及底栖生物的重金属含量及分布状况。
The main objective of the present study is to investigate the concentrations and distribution of heavy metals in sediments and benthic organisms (aquatic oligochaetes) from sewage .
本文报道了广州市河涌沉积物及底栖生物的重金属含量及分布状况。
The main objective of the present study is to investigate the concentrations and distribution of heavy metals in sediments and benthic organisms (aquatic oligochaetes) from sewage .
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