For high tolerance parts, a sintering part is put back into a die and repressed. In genera this makes the part more accurate with a better surface finish.
对较大公差的零件,烧结后可放回模具重新挤压。一般而言这会使零件更精确同时具有更好的表面光洁度。
Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in genera seem to sleep very little.
有迹象表明,这两种类型的睡眠,有梦和无梦的,在很大程度上取决于动物的生活习惯,食肉动物在统计上是更容易做梦超过猎物,依次更加有可能经历无梦的睡眠。
The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world.
锯脂鲤属的有着锋利牙齿的水虎鱼是和纳氏锯脂鲤是世界上最残忍的淡水鱼类。
Recently, living cells - many of which are Archaea from the Pyrococcus and Thermococcus genera - were found in a mud core taken from 1.6 km below the sea floor off the coast of Newfoundland.
最近,纽芬兰岛海岸的海床之下1.6千米深处取出的砂心泥中,发现了活着的细胞,其中很多是热球菌纲火球菌属的古菌。
If it is to reflect its evolutionary origins (as taxonomists would prefer) the genus needs to be divided up into many more smaller genera in which the species have similar characteristics.
如果一个物种是从进化源头一步步进化过来的(分类学家们这么认为),总属分化出来的各个分属里的物种应当具有相同的特征。
Melissa Thompson wrote the message "the razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world."
梅丽莎·汤普森在25.94秒内写了这条短息:“锯脂鲤属的有着锋利牙齿的水虎鱼是和纳氏锯脂鲤是世界上最残忍的淡水鱼类。”
The Coco de Mer belongs to the Coryphoidae subfamily and tribe Borasseae. Borasseae is represented by four genera in Madagascar and one in Seychelles out of the seven worldwide.
CocodeMer tree是棕榈科复椰子属的植物,这个植物群在马达加斯加岛(非洲岛国)有四个种属塞舌尔的种类约占世界上七分之一,分布于印度洋的沿海地区及其岛屿上。
RVF virus is a member of the Phlebovirus genus, one of the five genera in the family Bunyaviridae.
裂谷热病毒是沙蝇病毒属的一个成员,即布尼亚病毒科五种病毒之一。
They compared the number of new genera that firstappeared in coral reefs with those in other shallow-water environmentsand found the reefs were responsible for about 50% more.
他们比较了首次出现在珊瑚礁以及首次出现在浅水环境的新生物种数量,发现因珊瑚礁产生的新物种约多50%。
The samples also included another estimated 64 genera that were not in the databases.
样品还包括64个原本不在数据库中的基因。
There are also a number of old genera in the tropics, indicating that tropical extinction rates are lower than in temperate regions. So the tropics are also a museum of diversity.
无疑热带地区真的是生物进化的温床,还有,在热带地区存留着一定数量的老物种,这就说明了热带地区物种的死亡率比温带地区要低,所以热带地区还是存有多样物种的大型博物馆。
Taken together, the samples contained 101 known bacterial genera, 39 of them newly found in the mouth, the team reports today in Genome Research.
一起算的话,样品包含101个已知基因,其中39个是新发现于口腔中的。
Worm's team estimated the total number of genera, families, orders, classes, and phyla—a designation above class—in each kingdom.
沃姆(Worm)的团队估算每一个界中的属、科、目、类以及门类——一种高于“类”的名目——的总数。
In a 2003 study of new World species of Pheidole, the most abundant and biodiverse of ant genera, I described a total of 624 species in existing museum collections, of which 344 were new to science.3.
大头蚁是自然界中数量最多且种类最丰富的一种蚂蚁,在2003年一项针对美洲大陆大头蚁的研究中,我一共描述了624种现存于博物馆藏品的大头蚁,其中的344种为新物种3。
The record-breaking message is as follows: "The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world.
这条短信的内容是:The razor-toothedpiranhas of thegenera SerrasalmusandPygocentrusare themostferociousfreshwaterfishin the world.
There are over 250 species of 25 genera bamboo in the coastal region, which takes more than half in China.
沿海地区具有经济发达、生产技术先进等优势,该地区拥有竹类植物25属250多种,约占全国的一半。
Comparative observations were made on the morphology and anatomy of secretory cavities in leaves of 22 genera, 40 species and two varieties by the whole mounting, paraffin and thin section method.
利用整体透明、石腊和薄切片方法对芸香科22属,40种和2变种植物叶分泌囊的形态结构和分布进行了比较研究。
The floristic component of Yuanmou vegetation distinctly consists of the large part of tropical elements, in which some genera connect to the current typical savannas.
植被的植物区系组成明显以热带成分为主,其中有些属与近代典型热带草原有联系。
The development patterns of conidia of Arthrobotrys and its allied genera in nematophagous hyphomycetes were studied by the method of chamber culture.
采用小室培养法对食线虫丝孢菌节丛孢及其相关属的分生孢子发育类型进行了研究。
The results show that relationship among three genera in the subfamily Heliotropioideae of the Boraginaceae is close.
上述结果表明天芥菜亚科三个属之间有密切的亲缘关系。
Any of several usually hairy Old World plants, especially in the genera Anchusa, Brunnera, and Echium, having blue or violet flowers.
牛舌草一种多毛的东半球植物,尤指牛舌草属和蓝蓟属,有蓝色或紫色的花。
The oil cells and mucilage cells in the leaves of 13 species in 5 genera (Lauraceae) were comparatively studied with the methods of tissue clearing, paraffin sectioning and semi-thick sectioning.
利用组织透明法、石蜡制片法和薄切片法比较研究了樟科5属13种植物叶片中油细胞和粘液细胞的分布和结构。
In this article the origination and evolution of genera Houttuynia cordate is discussed as well.
本文中还讨论了蕺菜属植物的起源演化。
Based on the comparative anatomical studies of rhizome of 16 genera 77 species, 5 varieties and 15 form of Chinese bamboos, the authors find that there are varieties in the genera and species.
本文通过对国产散生竹16属77种、5变种和15变型的地下茎解剖结构的比较观察研究,发现竹类地下茎解剖结构特征在种属间是有差异的。
The results show that the taxonomic importance of hind wing venation characters isn't stability in the genera level and species level in Callichromini.
结果表明,后翅翅脉特征在该族内具有稳定性,在属间和种间不具稳定性,后翅翅脉特征在绿天牛族属级和种级中分类意义不大。
In this district, the mangrove plants consist of 12 species belonging to 12 genera in 8 families.
该地区的红树植物种类计有8科、12属、12种,以红树科植物占优势。
The comparative anatomical structure of leaves of 11 species in 6 genera in the Magnoliaceae of China was studied.
对国产6属11种木兰科植物叶片的结构进行了比较解剖学研究。
The comparative anatomical structure of leaves of 11 species in 6 genera in the Magnoliaceae of China was studied.
对国产6属11种木兰科植物叶片的结构进行了比较解剖学研究。
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