Eastern meridian（东子午线）是什么意思？音标发音+图解场景

东子午线 /ˈiːst ˈtʃaɪnə ˈsiː/ n

English: Eastern meridian · 东子午线

释义：Imaginary line connecting the poles and perpendicular to the Equator; located east of the Greenwich meridian.

这个词出现在以下图解场景（1）