heliacal rising

基本解释

• [天] 偕日升

英汉例句

双语例句

• The heliacal rising or setting of a star indicates to within a few days the date in the annual day-cycle.
  星辰偕日升降，说明了其在几天内年日循环的日期。
• 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学观测就是，古埃及人通过观察偕日升降的天狼星，预测出即将来临的尼罗河洪灾。

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词组短语

短语

• heliacal rising and setting 偕日升降
• heliacal rising or setting 偕日升落

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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

天文学

• 晨出
• 偕日升