The basic framework of international time zones is that there is about one hour difference in solartime 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。
2
There is no ongoing scientific debate about the fact that one day in solartime is comprised of 24 hours, or that one year is 365 days in length.
现在，对于太阳时的一天包括24个小时、一年有365天这样的事实已经不再存在科学上的争论。
3
The International Meridien Conference of 1884 established Greenwich Mean Time, referring to the mean solartime at the Royal Observatory in Greenwich, near London.
1884年，国际子午线大会确立了格林威治标准时间（GMT），即伦敦附近的格林威治皇家气象台（the Royal Observatory in Greenwich）的平均太阳时间。