网络铱地层 网络释义 1. 铱地层 根据年龄有 6500 万年的“铱地层”(Iridium layer)在全世界的分布以及含量,阿尔瓦雷茨团队估计是因为一颗直径 10 到 14 公… zh.wikipedia.org|基于9个网页 例句 释义: 全部,铱地层
An iridium precursor, and an iridium layer from the precursor is described. The Ir(I) in the precursor becomes Ir(III) in a reduction pathway before forming an Ir(0) layer.Blackwell, James M.Lavoie, Adrien R.Morrison, Darryl J.Barrow, Bill...
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美[ɪ'rɪdiəm] 英[ɪ'rɪdiəm] n.铱 网络铱星;铱星系统;铱卫星 权威英汉双解 英汉 英英 网络释义 iridium n. 1. 铱a chemical element. Iridium is a very hard yellow-white metal, used especially in making alloys .
the pipe during the installation. The peel ply can prevent contamination of the repair surface up to the time it is removed. The peel ply should tear a very thin layer of resin from the surface of the composite to create a fresh clean anchor pattern surface ready to paint and avoid ...
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There remained one doubt. Iridium does exist within Earth, and it is brought to the surface by volcanic eruptions. It still seemed just possible that volcanic eruptions on a truly massive scale could have put the iridium layer in place, and such eruptions would, of course, be bad news for...
In 1978 geologist Walter Alvarez found an unusually high concentration of the elementiridiumin a layer of clay. This layer formed at the time dinosaurs and many other organisms went extinct. The iridium deposits were a great surprise, since iridium is very rare at the Earth's surface. Most ...
(acac)3and the type of targets inpolycrystallineIr coating microstructure and morphology were investigated between 185 and 210°C on quartz and Nb substrates. SEM studies indicated the formation of a two-layer structure. The Ir deposits on quartz are smoother than those on Nb.275Ir–C cluster ...
美[ɪ'rɪdiəm] 英[ɪ'rɪdiəm] n.铱 网络铱星;铱星系统;铱卫星 权威英汉双解 英汉 英英 网络释义 iridium n. 1. 铱a chemical element. Iridium is a very hard yellow-white metal, used especially in making alloys .