基本解釋[天文學(xué)]偕日落夕沒(méi)偕日降英漢例句雙語(yǔ)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，說(shuō)明了其在幾天內(nèi)年日循環(huán)的日期。heliacal setting更多例句詞組短語(yǔ)短語(yǔ)heliacal rising and setting 偕日升降heliacal rising or setting 偕日升落heliacal setting更多詞組專業(yè)釋義天文學(xué)偕日落夕沒(méi)偕日降