| 1. | X-ray astronomy has made impressive progress .
X射线天文学已取得了引人注目的进展。
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| 2. | The distinct processes are involved in x-ray emission .
X射线的发射，包含不同的过程。
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| 3. | The x-ray was very revealing .
X射线十分揭示问题。
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| 4. | In x-ray fluorescence, pieces of the filter are used directly .
在X射线荧光法中，可直接使用滤纸。
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| 5. | Cygnus x-3 is a binary x-ray source located at a distance of 10kpc .
天鹅座X-3是一个距离约10千秒差距的双重X射线源。
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| 6. | Scientists photograph these images to produce the spectacular x-ray pictures .
科学家们对这些图像进行摄影，制成壮观的X射线图。
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| 7. | They use x-ray diffraction to determine the structures of proteins and nucleic acids .
他们应用X-射线衍射确定蛋白质和核酸的结构。
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| 8. | A high beam energy is also used to stimulate x-ray emission of higher-energy peaks .
高能量电子束也能用来激发高能量X射线峰的发射。
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| 9. | With radio and x-ray telescopes, we find many signs of violent activity .
依靠射电望远镜和x射线望远镜，我们发现了许多迅猛活动的迹象。
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| 10. | Contribute a little to either ultra-violet astronomy or x-ray astronomy .
所以气球携带的仪器对紫外线天文学或Ｘ射线天文学的贡献是不大的。
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