heliacal rising [天] 晨出 ; 偕日出
heliacal setting [天] 偕日落 ; [天] 夕没 ; 偕日降
heliacal year 偕日年
heliacal rising and setting 偕日升降
heliacal cycle 太阳周
heliacal scanning 螺旋扫描
heliacal rising or setting 偕日升落
heliacal energy water heater 太阳能热水器
"the heliacal rising of the Dog Star"; "the heliacal or Sothic year is determined by the heliacal rising of Sothis (the Egyptian name for the Dog Star)"
同义词： heliac
以上来源于: WordNet
This annual event is called a heliacal rising.
这个一年一度的活动被称为“偕日升”。
They continually adjusted it to the heliacal rising of Sirius, ensuring that they never got too far off in their seasons.
他们不断地调整它以适应天狼星的偕日升，确保他们在自己的季节里不会偏离太远。
This administrative calendar existed alongside the earlier agricultural and religious calendar that depended on the heliacal rising of Sirius.
这个行政日历与早期依赖于天狼星偕日升的农业和宗教日历并存。
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