heliacal rising

常见例句

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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