The basic framework of international time zones is that there is about one hour difference in solar time for every 15 degrees of longitude.
国际时区的基本框架是经度每隔15度，太阳时就相差一小时。
The basic framework of international time zones is that there is about one hour difference in solar time for every 15 DE GREes of longitude.
国际时区的基本框架是经度每隔15度，太阳时就相差一小时。
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