astronomical unit
US /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
UK /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
1.
天文单位
a unit of length, roughly the distance from Earth to the Sun, used to express distances within the solar system. It is approximately 150 million kilometers (93 million miles).
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Mars is about 1.5 astronomical units from the Sun.
火星距离太阳约1.5天文单位。
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The distance between Earth and the Sun is defined as one astronomical unit.
地球与太阳之间的距离被定义为一天文单位。
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