常見例句雙語例句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(nèi)年日循環(huán)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(xué)觀測就是，古埃及人通過觀察偕日陞降的天狼星，預(yù)測出即將來臨的尼羅河洪災(zāi)。 返回 heliacal rising