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fourth contact中文是什么意思

发音:  
用"fourth contact"造句"fourth contact"怎么读"fourth contact" in a sentence

中文翻译手机手机版

  • 日、月食的)复圆

例句与用法

  • Even with the much closer venus , the observations were tricky ; it was crucial to know the exact geographic positions of the observing stations and to accurately time the four “ contacts ” between venus and the sun . ( the first and second contacts occur at ingress , when venus ' s disk touches the sun ' s from first the outside and then the inside ; the third and fourth contacts occur at egress . ) but the potential payoff from the observations would be enormous
    即使是距离近得多的金星,这个测量也不容易;必须要知道观测站确实的地理位置,且要能准确测定凌日时金星和太阳发生四次接触的时间(第一和第二次接触发生在初切,即金星的盘面由外然后再内接触到太阳盘面;第三和第四次接触发生于终切) 。
用"fourth contact"造句  

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