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- The society was set up to preserve endangered species form extinction. 成立这个协会是为了保护濒危物种不致灭绝。
- Desmids A group of green algae of the phylum GAMOPHYTA that are basically single-celled but in some species form filamentous or irregular colonies. 鼓藻:绿藻门鼓藻科的一类植物。藻体为单细胞或群体,群体呈球状或丝状。
- Where species form apomictic clones that are very difficult to distinguish from each other, they are termed aggregate species, e.g. bramble (Rubus fruticosus agg.). 从单性生殖系产生的物种极为相似,几乎无法分辨,这被称为复合种。
- The remaining species form a well-supported clade, which in turn can be divided into smaller groups. 余下的物种形成一个良好的支持分支,这反过来又可以分为较小的团体。
- They collect ast amounts of sequence fragments, which contain genetic information of thousands of species forming communities that colonise a certain habitat. 他们收集了海量的序列片段,其中包括数千种来源于具有拓殖特定栖息地的生物群体的遗传信息。
- Objective To study the growth and decay of mosquitoes density and the species forming in towns and villages in Lianyungang city, and to provide the scientific basis for preventing mosquitoes. 目的了解连云港市城乡蚊虫密度的消长及种群构成,为制定蚊类防制措施提供科学依据。
- Group II includes P.albina, P.nigra, P.chemnitzi and P.radiata, among which the former two and latter two species form 2 distinct subgroups, Group IIA and IIB.Group III includes P.margaritifera and P.maxima. chemnitzi和射肋珠母贝P.;radiata;其中前2个种聚合成1枝;后两个种聚合成另一枝;分别形成两个亚群类群IIA和类群IIB。
- Work done a couple of years ago by Mark Pagel of Reading University, in England, suggests that about a fifth of evolutionary change happens jerkily at around the time new species form. 英国瑞丁大学的马克.;佩奇几年前作过的研究表明,大约五分之一的进化变革在新物种形成时迅速发生。
- Samples of each of these five species formed highly supported monophyletic groups and had long genetic distance between them. 结果显示五个种类的样本在系群演化树中各自形成具高度支持的单系群,且种间彼此区隔以偏高的遗传距离。
- The carbon species formed by the hydrogenation of adsorbed CO on the surface of Fe-Mn based catalysts were characterized with TPSR method. 采用程序升温表面反应(TPSR)方法,研究了F-T合成铁-锰系催化剂于不同条件下吸附CO后,在催化剂表面形成的不同加氢活性碳物种的形态和反应性。
- For propylene epoxidation,characterization revealed that the hydroperoxide species formed on Au surface by reaction of H2 and O2 was the intermediate of the reaction. 在丙烯直接环氧化反应中,由H2和O2在金颗粒表面反应生成的过氧化物种是反应中间体; 在选择性氧化和选择性加氢反应中,金催化剂表现出优良的活性和稳定性。
- Not only has Homo sapiens been doing some major genetic reshuffling since our species formed, but the rate of human evolution may, if anything, have increased. 在现代智人诞生后,不仅重大的基因重组事件仍层出不穷,演化速度甚至越来越快。
- For propylene epoxidation, characterization revealed that the hydroperoxide species formed on Au surface by reaction of H2 and O2 was the intermediate of the reaction. 在选择性氧化和选择性加氢反应中,金催化剂表现出优良的活性和稳定性。
- Do wolves belong to the canine species? 狼是犬科动物吗?
- The other nations are forming a federation. 其他国家正在结成联盟。
- We should do our best to save endangered species. 我们应该竭尽全力挽救濒于灭绝的生物。
- One of several metal strips forming a leaf spring. 簧片构成片簧的几个金属片中的一个
- This rare bird has become an endangered species. 这种珍禽已成为濒临灭绝的物种。
- Forming or enclosed in a sheath. 有鞘的形成鞘的或装在鞘内的
- He was wearing a strange species of hat. 他戴着一种奇怪的帽子。