au astronomical unit
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。
—— 辞典例句An astronomical unit is the distance between Earth and our sun.
一个天文单位是地球与太阳之间的距离。
—— 给力词典精选This distance is known as the ´astronomical unit´ or AU.
这个距离被称为“天文单位”或 AU。
—— 给力词典精选Halley was aware that the AU was one of the most fundamental of all astronomical measurements.
哈雷知道,天文单位是所有天文学测量中最基本的。
—— 给力词典精选The AU is a cosmic measuring rod, and the basis of how we scale the Universe today.
天文单位是宇宙的标尺,是我们今天测量宇宙的基础。
—— 给力词典精选