到了近代，将地球表面按经线等分为24个时区，这是由1884年国际经度会议制定的。

To modern time measure, people divide the surface of the earth into 24 time zones according to longitude lines. This method was established by the International longitude Conference in 1884.

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我之前谈过经度（longitude）和纬度（latitude），它们是用来标度连接两极的经线、以及平行于赤道的纬线的角度单位。

The other day I talked about longitude and latitude which are measured as angles around the equator and toward the poles.

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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.

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