以下为句子列表：
英文: Both research teams dated the zircon grains by analyzing their isotopes of uranium.
中文: 两研究小组通过分析它们的铀同位素确定了锆石颗粒的存在时间。
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英文: I really need complete set of zircon processing machine, include zircon spiral separator, drying machine, vibraton screen ( if needed ), magnetic separator, etc.
中文: 我真的需要一整套锆石加工设备，包括锆石螺旋分离器、干燥机、振动筛(若需要)、磁性分离器,等。
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英文: In the past five years, however, geologists—including my group at the University of Wisconsin-Madison—have discovered dozens of ancient crystals of the mineral zircon with chemical compositions that are changing our thinking about the earth's beginnings.
中文: 然而，过去五年间，地质学家（包括我们威斯康辛大学麦迪逊分校的团队在内）发现了几十个古代锆石矿物的结晶，它们的化学成份让我们不得不改变对于地球起源的想法。
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英文: It was not until 1999 that technological advances allowed further study of the ancient zircon crystals from Western Australia—and challenged conventional wisdom about the earth's earliest history.
中文: 直到1999年，随著科技的进步，科学家得以对澳洲西澳省的古锆石结晶做更深入的探究，这些新出炉的结果因而挑战著传统的智慧。
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英文: Most studies of these crystals have focused on the chemical makeup of the zircon itself.
中文: 很多针对这些晶体的研究侧重在锆石自身的化学结构上。
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