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  1. PyDict

    the star of day

    • ph.
  2. 知識+

    • Dog days!!!

      ...stretch of hot and sultry weather. They named this period of time, from 20 days before the conjunction to 20 days after, “dog days” after the dog star. ) 現在,科學證明天狼星不是七、八月酷熱的原因,但是...

    • 地球為什麼有晝夜變化?{英文}(非常急!!!)

      ... in which planets wouldn’t have night and day although we don’t know of any yet," says Massey. A planet close to a star could experience "captured rotation" (like our ...

    • 請解釋warp speed

      ...legend has it, back in the pre-production days of STAR TREK: THE NEXT by printing it in page 555 in the Star Trek Encyclopedia.