n.子午线，经线
adj.子午圈的，正午的，顶点的，全盛时期的

原形：meridian复数：meridians

The longitudinal meridians in acupuncture run vertically down the body from the base of the skull to the feet.
中医经络中的经线从头骨底部到脚底垂直贯穿身体。
The magnetic meridian lines on a compass align with the Earth's natural magnetic field.
罗盘上的磁经线与地球的自然磁场对齐。
The International Date Line, also known as the 180th meridian, separates one calendar day from the next.
国际日期变更线，又称180度经线，划分了一天和另一天。
The Greenwich Meridian marks the Prime Meridian, the reference line for calculating longitude around the world.
格林尼治子午线是本初子午线，全球计算经度的参考线。
The sun rises in the east and sets in the west along the terrestrial meridian.
太阳沿地平经线从东方升起，在西方落下。
The Arctic Circle lies at about 66.5 degrees north latitude, which is the northernmost meridian.
北极圈位于北纬约66.5度，是北界经线。
In geography, a meridian of longitude runs horizontally across the Earth's surface, passing through the North and South Poles.
在地理学中，经线是水平穿越地球表面的，通过南北两极。
The Royal Observatory in Greenwich, London, was established to define and mark the zero meridian.
伦敦格林尼治皇家天文台建立是为了定义并标记零度经线。
Meteorologists often refer to weather data by reporting temperature along specific meridians.
气象学家常常通过报告特定经线上的温度来引用天气数据。
During a solar eclipse, the moon passes between the Earth and the sun, casting its shadow on the Earth's surface, creating a path of totality along the umbra meridian.
日食期间，月球位于地球和太阳之间，其阴影落在地球上，形成一个全食路径，沿着暗影经线。