heliacal rising

基本解释

• [天] 偕日陞

英汉例句

雙語例句

• The heliacal rising or setting of a star indicates to within a few days the date in the annual day-cycle.
  星辰偕日陞降，說明了其在幾天內年日循環的日期。
• One of the most famous of all ancient scientific observations was that of the heliacal rising of Sirius which warned the ancient Egyptians of the imminent inundation by the Nile.
  古代最有名的一例科學觀測就是，古埃及人通過觀察偕日陞降的天狼星，預測出即將來臨的尼羅河洪災。

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词组短语

短語

• heliacal rising and setting 偕日陞降
• heliacal rising or setting 偕日陞落

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英英字典

柯林斯英英字典

• the rising of a celestial object at approximately the same time as the rising of the sun

• heliacal rising剑桥字典
• heliacal rising柯林斯字典

专业释义

天文學

• 晨出
• 偕日陞