constant of integration

例句：

1. 1. The temperature is constantat 25 degrees Celsius.
   温度在25摄氏度时保持不变。
2. 2. Thesun's constant motion through the skyis a wonder to behold.
   太阳不断穿越天空的运动是一种令人惊叹的景象。
3. 3. Theconstant flow of water in the river isessential for life on Earth.
   河流中不断流动的水对地球上的生命至关重要。