upper meridian passage

例句：

1. 1. The upper meridian passage is a critical area forthe exchange of energy and matter between theEarth's surface and the atmosphere.
   上赤道通道是地球表面与大气之间能量和物质交换的关键区域。
2. 2. Duringthe solar eclipse, the upper meridian passage becomes dark due to theblocking of sunlight by the moon.
   在日食期间，由于月亮遮挡阳光，上赤道通道变得黑暗。
3. 3. The uppermeridian passage plays a crucial rolein maintaining the balance of the Earth's climate system.
   上赤道通道在维持地球气候系统平衡中起着至关重要的作用。