Indeed, two iridium layers have been found in some places.
事实上，在某些地方发现了两个铱岩层。
Indeed, two iridium layers have been found in some places.
确实，有些地方发现了有两个铱层。
In all of these, iridium complexes are the most effective.
在这些材料中，金属铱配合物最为有效。
Iridium is probably the best known for a variety of reasons.
铱大概是最好已知有很多原因。
By the way, I like it very much, "Iridium" that the marketing program.
顺便说一句，我非常喜欢“铱星计划”的那个营销方案。
Iridium satellites are unusual because their orbit is so low and they move so fast.
铱卫星通常轨道较低，其运动较快。
Comets consist of "dirty ice", rather than solid rock, and so contain little iridium.
彗星是由“脏冰”所组成，而不是像小型那样由固体岩石组成，所以只含有少量的铱。
The international primary standard for the kilogram is made of 90% platinum, 10% iridium.
重量和长度的国际标准原型用90%的铂，10%的铱制成。
The international primary standard for the kilogram is made of 90% platinum, 10% iridium.
重量和长度的国际标准原型用90%的铂，10%的铱制成。
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