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。
The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.
显然是会情绪溢于言表的刘易斯留着胡须，神情疲惫。在他的支持者和热心人们的帮助下，他抬着自己的船穿过位于皇家天文台的格林尼治子午线。
Bearded and looking tired, a clearly emotional Lewis crossed the Greenwich Meridian line at the Royal Observatory by carrying his boat with the help of supporters and cheering well-wishers.
显然是会情绪溢于言表的刘易斯留着胡须，神情疲惫。在他的支持者和热心人们的帮助下，他抬着自己的船穿过位于皇家天文台的格林尼治子午线。
Bearded and looking tired, a clearly emotional Lewis crossed the Greenwich Meridian line at the Royal Observatory by carrying his boat with the help of supporters and cheering well-wishers.
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