“light-year”的概念、定义、翻译、参考文献-科学参考

单词	light-year
释义	light-year [`līt ´yir] ^ASTROPHYSICS A unit of measurement of astronomical distance; it is the distance light travels in one sidereal year and is equivalent to 9.461 × 10¹² kilometers or 5.879 × 10¹² miles.
随便看	track in range track-laying vehicle trackless mine trackless tunneling track made good track pitch track-return power system track shifter track telling track-to-track access time track-while-scan traction tractional force traction diverticulum traction meter traction tube tractor tractor drill tractor-feed printer tractor fuel tractor gate tractor loader tractor shovel tractrix trade air

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