这一铱异常为阿尔瓦雷斯假说提供了强有力的支持，尽管小行星本身从未被发现。
This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.
这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。
This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.
小行星碰撞后的碎片可能会含有大量的铱，而大气洋流会把这些物质带到全球各地。
Debris thrown into the atmosphere by an asteroid collision would presumably contain large amounts of iridium, and atmospheric currents would carry this material all over the globe.
他们偶然发现一种稀有金属铱的含量在边界处突然变得很丰富，然后又慢慢地消失了。
They had found, accidentally, that a rare metal, iridium, suddenly became very abundant exactly at the boundary and then slowly fell away.
尤卡坦半岛上富含铱的沉积层和一个巨大的陨石坑提供了证据，证明了约6500万年前，一颗大型陨石撞击了地球。
An iridium-enriched sediment layer and a large impact crater in the Yucatn provide evidence that a large meteorite struck Earth about 65 million years ago.
铱存在于陨石和火山物质中，但在火山物质中同时包含高浓度的镍和铬。
Iridium occurs in meteorites and volcanic material, but in the latter case it is accompanied by elevated levels of nickel and chromium.
人们发现，在一些保存着太阳系原始化学成分的陨石中，铱元素的含量很高。
Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.
事实上，在某些地方发现了两个铱岩层。
他们也在寻找一种比铱更便宜的催化剂。
在这些材料中，金属铱配合物最为有效。
在某些情况下，我们必须用铱卫星电话交流。
On some occasions, we would have to use Iridium satellite phones for communication.
进一步说明了铱在卤化银晶体中的电子陷阱作用。
It is confirmed that iridium ion dopants in the crystals act as electron traps.
然而这个岩层中的铱含量是正常含量的200倍。
However, the content of iridium in the rock formation is 200 times the normal concentration.
本文深入研究了一系列含铱磷光化合物的光电性质。
An in-depth investigation on the optical and electronic properties of a series of cyclometalated iridium phosphors was provided here.
在这个木炭层中，研究人员并没有发现铱，或者至少不是大量的铱。
Something the researchers have not found in this layer is iridium, or at least not a lot of it.
若用相同大小的20纳米烟尘颗粒替换铱粒子，则摄入率降低75%。
Change the 20-nanometer iridium to same-sized soot particles and the uptake rate falls by 75 percent.
简要介绍锇铱矿的基本特征和资源状况，生产及处理工艺。
The basic characteristics of osmiridium, and its resources production and processing were discussed.
自然界中可能不存在纯铱，通常和其它贵金属共生于天然合金中。
Iridium probably does not occur uncombined in nature but it is found in natural alloys with other noble metals.
依此思路推测，它有点像“铱闪光”，它是由太阳光反射到铱卫星上所产生。
In this way it would act like an 'iridium flare.' The flares are created by sunlight reflecting off iridium satellites.
本论文研究了铱催化的喹啉和吡啶衍生物以及环外烯胺的不对称氢化。
In this dissertation, Ir-catalyzed asymmetric hydrogenation of quinoline derivatives, pyridine derivatives and exocyclic enamines have been studied.
到目前为止，大部分方式还在依赖象铱那样不实用的稀有原料作为引发反应的催化剂。
Until now, most approaches relied on impractically scarce materials like iridium as a catalyst that triggers the reaction.
这些研究人员还在寻找更便宜的催化剂。现在的铱催化剂相对来说比较昂贵。
The researchers are also seeking a catalyst that is cheaper than one based on iridium, which is relatively expensive.
的确，在一些地区已经发现了2层铱矿，位于撞击点北部的印度城镇Anjar就是其中之一。
Indeed, two iridium layers have been found in some places. Anjar, an Indian town north of the impact site, is one.
铱，通常被用于太空火箭，比铂金稀有十倍并且高度耐热，因此理论上即使它掉进岩浆中也不会熔化。
Iridium, usually used in space rockets, is ten times rarer than platinum and highly resistant to heat so theoretically it can be dropped it into lava, and it will not melt.
该车采用独特的铱蓝色车上涂装搭配深色前大灯罩，铝制车顶行李架和21英寸合金轮圈。
It features an exclusive Iridium Blue exterior with tinted headlights, aluminum roof rails and 21-inch alloy wheels.
在一个案例中，业内高管发现一种号称纯金的涂层其实是一种复杂的合金，含有锇、铱、钌、铑等稀有金属。
In one case, executives discovered a coating advertised as pure gold that masked a complex alloy, which included rare metals such as osmium, iridium, ruthenium and rhodium.
本文介绍全球移动卫星通信系统的现状、种类及其将来的发展趋势。对“铱”星系统也作了介绍。
This paper introduces the present and future of Global mobile Satellite communication system. IRIDIUM system is also introduced.
目的评估两种不同结构设计的国产铂-铱合金明胶蛋白涂层支架置入兔颈动脉后长期的生物相容性。
Objectives To assess the biocompatibility of the two kinds of different design and wire diameter gelatin coated Platinium Iridium(Pt Ir) stents in rabbit carotid arteries.
目的评估两种不同结构设计的国产铂-铱合金明胶蛋白涂层支架置入兔颈动脉后长期的生物相容性。
Objectives To assess the biocompatibility of the two kinds of different design and wire diameter gelatin coated Platinium Iridium(Pt Ir) stents in rabbit carotid arteries.
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