The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.

国际本初子午线大会于1884年把横过英国格林尼治天文台的一条经线定为参考线，在该线上经度为零。

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GMT is a universal time zone, based on the Greenwich meridian corrected by the longitude of the location in which the time is set.

GMT是一种通用时区，是根据格林威治子午线，用设定时间所在位置的经度与其求差计算出来的。

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The rare lunar eclipse has fallen on the winter solstice at the Greenwich meridian of December 21, 2010, making the day the "darkest" ever in 372 years.

2010年12月21日正午时分(格林尼治时间)，月全食和冬至时间偶遇，于是372年来最“黑暗”的日子就此诞生。

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They set off from the Greenwich Meridian Line in London in 1994 and cycled through Europe before heading out over the Atlantic on a unique pedal-powered boat.

BBC: Jason Lewis: Circumnavigating the world