constancy of level

例句：

1. 1. The constancyof the stars in the night sky is truly mesmerizing.
   夜空中星星的恒定性令人着迷。
2. 2.The constancy of the sun's position in the sky has been studied for centuries.
   太阳在天空中的位置恒定性已经研究了几个世纪了。
3. 3. The constancy of the ocean waves is a testament to nature's unchanging rhythms.
   海洋波浪的恒定性是大自然不变节奏的见证。