单词	light-year
释义	Light-year The distance that light travels in a vacuum in one year. It is about 9.46 trillion kilometers, or 9.46 x 1015 meters Proxima Centauri, our nearest star (apart from the Sun), is about 4 light years away. In other words: if we go at the speed of light (about 300,000 km per second) for just over 4 years we would cover the distance to it. Note that light-year is not a measure of time. See: Speed
随便看	factor factor theorem factor tree factorial factoring factorising fahrenheit fall femto- fibonacci sequence figurate number finance charge financial goals financial literacy financial plan finite finite number first flat flip fluid ounce focus foil method foot force

数学辞典收录了1200条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。