- 問題詳情:Stopreadingforaminuteandthinkaboutwhatyouseewhenyoulookupattheskyonaclearnight.Youprobablyseemanystars.Longlongago,farmerswatchedsomestarstoknowwhentoplanttheircrops.Travellersdidsotofindtheirwaysinthedark.Todaystarsarestillimportanttosomepeo...
- 20703