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  Time Zonesand the International Date Line

  Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart.You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.

  If you make a five-day trip across the Atlantic Ocean, Your ship enters a different time zone every day.As you enter each zone, the time changes one hour.Traveling west, you set your clock back;traveling east, you set it ahead.Each day of your trip has either twenty-five or twenty-three hours.

  If you travel by ship across the Pacific, you cross the international date line.By agreement, this is the point where a new day begins.When you cross the line, you change your calendar one full day, backward or forward.Traveling east, today becomes yesterday;traveling west, it is tomorrow!

  时区和国际日期变更线

  你在旅行中,在时间方面会有一些奇怪的事情发生,因为地球分成24个时区,每时区间相隔一小时。在你度过的日子中,可能有多于或少于24小时的;在你度过的星期中,也可能有多于或少于7天的。

  假如你进行为期5天越过大西洋的旅行,你的船每天都进入一个不同的时区,每进入一个时区,时间便改变1小时。朝西旅行,你把时钟往后拨;往东旅行,你把时钟向前拨。你旅行中的每一天要么是25小时,要么是23小时。

  如果你乘船越过太平洋,你将穿过国际日期变更线。按协定,这是新的一天开始的地方。穿过这条线时,你要在日历上往后或往前更动一整天。朝东旅行,今天变成昨天;往西旅行,今天就是明天。


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