This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.
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。
Iridium occurs in meteorites and volcanic material, but in the latter case it is accompanied by elevated levels of nickel and chromium.
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。
They had found, accidentally, that a rare metal, iridium, suddenly became very abundant exactly at the boundary and then slowly fell away.
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。
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.
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。
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.
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。
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.
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。
They're also seeking a cheaper catalyst than iridium.
他们也在寻找一种比铱更便宜的催化剂。
On some occasions, we would have to use Iridium satellite phones for communication.
在某些情况下，我们必须用铱卫星电话交流。
They were especially interested in a 30-ft. layer of sediment just above the iridium layer.
他们对30英尺深度略高于铱层的一个沉积层特别感兴趣。
Thales Alenia is building the next set of 66 Iridium low-Earth orbiting (LEO) satellites.
泰雷兹阿莱尼亚公司正在建造66颗下一代低轨道(LEO)铱星。
Something the researchers have not found in this layer is iridium, or at least not a lot of it.
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。
Change the 20-nanometer iridium to same-sized soot particles and the uptake rate falls by 75 percent.
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%。
Iridium also has participated in testing its Netted Iridium service with the U.S.Marine Corps Warfighting Lab.
铱星还参与了与美国海军陆战队作战实验室联网的铱星服务试验。
Iridium also has participated in testing its Netted Iridium service with the U.S. Marine Corps Warfighting Lab.
铱星还参与了与美国海军陆战队作战实验室联网的铱星服务试验。
Iridium also has participated in testing its Netted Iridium service with the U. S. Marine Corps Warfighting Lab.
铱星还参与了与美国海军陆战队作战实验室联网的铱星服务试验。
As a result, the unit continued to be defined in explicit reference to a unique platinum-iridium ingot until 1960.
结果，直到1960年，这个计量单位都用一只独一无二的铂铱锭来标示。
Indeed, two iridium layers have been found in some places. Anjar, an Indian town north of the impact site, is one.
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。
In this way it would act like an 'iridium flare.' The flares are created by sunlight reflecting off iridium satellites.
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。
The researchers are also seeking a catalyst that is cheaper than one based on iridium, which is relatively expensive.
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。
Chang 'e 3 is supposed to launch sometime in 2013 and land in Sinus Iridium, where it will deploy an autonomous rover.
嫦娥3号计划在2013年的某个时间发射，计划在彩虹湾着陆，并在那里部署一个自动登月车。
Until now, most approaches relied on impractically scarce materials like iridium as a catalyst that triggers the reaction.
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。
A spokesman said: 'Each Zafirro Iridium is custom made from the strongest, purest, and most durable materials available anywhere.
一位发言人表示：“每支铱金蓝宝都是用最坚韧的、最纯净的和最耐用的稀有材料量身打造的。”
If you wanted that iridium silver 2008 Benz, then find pictures of it in magazines and make a page exclusively dedicated to that goal.
如果你想要铱银2008奔驰，在杂志中找到它的照片，用单独一页描述该目标。
Bright north star Polaris stands above the peak in an exposure that also captures the brilliant trail of a polar orbiting Iridium satellite.
峰顶正上方是明亮的北极星，这次曝光正好逮住了一颗极轨铱星的闪光。
The new network will maintain the Iridium constellation architecture of 66 cross-linked LEO satellites covering 100 percent of the globe.
新网络将保持66颗跨链低轨卫星的星座体系，覆盖全球所有区域。
They engineered it so that one end carries a catalyst-iridium oxide. Bound at the other end are light-sensitive pigments, zinc porphyrins.
他们将其重新编程，使一段带有催化剂——氧化铱，另一端则带有光敏色素锌卟啉。
Iridium can also be found in crystals in computer memory devices, deep-water pipes, X-ray telescopes and the equipment that makes rayon fibers.
在电脑内存设备护面，深水导管，X射线望远镜和制造粘胶纤维的设备中，也都能找到铱的身影。
This story, though, raises the question of why there is but a single ejecta layer of iridium and shocked quartz in late Cretaceous rocks around the world.
然而，查特基博士的说法引发了疑问：为什么全球白垩纪晚期岩石中含有冲击石英和铱的喷发物地层只有一层？ 答案或许是，两次撞击是在同时发生的。
This story, though, raises the question of why there is but a single ejecta layer of iridium and shocked quartz in late Cretaceous rocks around the world.
然而，查特基博士的说法引发了疑问：为什么全球白垩纪晚期岩石中含有冲击石英和铱的喷发物地层只有一层？ 答案或许是，两次撞击是在同时发生的。
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