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- Light-year is an astronomical unit. 光年是一个天文单位。
- The distance from the sun to earth is one astronomical unit. 太阳到地球的距离即为一个天文单位，
- One astronomical unit equals the distance from the earth to the sun. 一天文单位等于从地球到太阳的距离。
- One astronomical unit is equal to the average radius of the Earth's orBit, aBout 93, 000, 000 miles. 一个天文单位等于地球轨道的平均半径，大约是93，000，000 英里。
- light-time for astronomical unit distance 天文单位距离的光行时
- But the results were sufficiently ambiguous that many astronomers, including Newcomb, argued that the transit of Venus was not a good method for determining the astronomical unit. 但是这些结果的误差之大，使得很多天文学家（包括纽康）都认为金星凌日不是测定天文单位的好方法；
- On Aug. 15, NASA's enduring Voyager 1, already Earth's farthest-flung robotic ambassador, became the first spacecraft to reach a distance of 100 astronomical units (AU) from the Sun. 在8月15日，美国国家航天局的旅行者一号，已经是地球的最遥远的机器人大使。成为第一架抵达距太阳100个天文单位（AU）的距离。
- He was too poor to buy an astronomical telescope. 他太穷了，买不起天文望远镜。
- The luminous intensity on unit area. 单位面积上的发光强度。
- The family is the smallest social unit. 家庭是社会最小的单位。
- Pressure is force per unit area. 压力就是电单位面积上的力。
- Astronomical sums of money will be needed for this project. 这项工程需要异常庞大数额的资金。
- A set of data elements which are handled as a unit. 作为一个单元来处理的一组数据元素。
- The family is the basic unit of society. 家庭是社会的基本单位。
- The price of this gem is expensive -- as much so as astronomical figures. 这个宝石的价格十分昂贵－－简直是个天文数字。
- A metric unit of area equal to 10 ares. 十公亩面积的公制单位之一，等于十公亩。
- A metric unit of mass equal to 100 grams. 百克公制质量单位，等于100克。
- A unit of power equal to 1,000 watts. 千瓦功率的单位，等于1,000瓦。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- His wife was astonished at the astronomical sum of money he had spent. 他的妻子被他花的天文数字的钱款惊呆了。
