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1·Lulin, like all comets, isa clump of frozen gases mixed with dust.

鹿林彗星和其他彗星一样，是一堆冰气体和尘埃组成。

2·Lulin, discovered in July 2007, is now visible to the naked eye in dark, rural skies.

年7月发现的鹿林彗星现在可以在黑暗中的农村天空里用肉眼见到。

3·NASA's Swift satellite views Comet Lulin as it made itclosest approach to Earth in February 2009.

NASA的Swift卫星观察到鹿林彗星，这颗彗星于2009年2月最接近地球。

4·Lulin passed closest to Earth -- 38million miles, or about 160 times farther than the moon -- late on theevening of Feb. 23, 2009, for North America.

鹿林彗星路过地球最近时距离3800万英里，大约是月球的160倍，时间是北美2009年二月23日深夜。

5·This paper, based on Lulin's advantage in cultural resources, presents a project aiming to construct a research database of the intellectual celebrities of Lulin in the Song Dynasty.

本文论述了“宋代庐陵文化名人研究数据库”建设的背景及意义，详细阐述了数据库建设的思路与步骤。