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日界线及其时间的推算规律 1.日界线是180°: 日界线是国际上确定时区和计算区时的必然产物。日界线就是指180°经线。它是统一的十二区的中央经线,又是东十二区和西十二区的分界线。日界线的东侧是西十二区,西侧是东十二区。
The derivation of the dateline and its time 1. The dateline is 180°: The dateline is an inevitable outcome of the international determination of the time zone and the calculation zone time. The date line refers to the 180° warp. It is the unified 12-zone central meridian and the boundary between the East 12 and West 12 districts. The east side of the date line is the 12th zone in the east, and the 12th zone is in the west.