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1884年10月,来自世界25个国家的41名代表汇聚美国华盛顿,举行了著名的国际经度会议(又称国际子午线会议)。本次会议形成了多项决议,其中“采用以通过格林尼治(旧译“格林成治”)的本初子午线为基准的时区制”的决议产生的影响最大。国际经度会议所划分的标准时区,只是理论上和原则性的规定,称为理论时区。按理论时区确定的标准时,即为区时。理论时区是按经度来划分的,完全不考虑地球上的海陆分布和政治疆界。根据一日分
In October 1884, 41 delegates from 25 countries in the world gathered in Washington, DC and held the famous International Longitude Conference (also known as the International Meridian Conference). A number of resolutions were formed at the conference, in which “the adoption of a time zone system based on the Prime Meridian of Greenwich (the old translation of ”Gin Cheng Zhi Zhi") had the greatest impact. The standard time zones divided by the International Longitude Conference are only theoretical and principled, and they are called theoretical time zones. When the time zone is determined by the theoretical time zone, it is the time zone. The theoretical time zone is divided by longitude and does not consider the land and sea distribution and political boundaries on Earth. According to one day