constant bit rate

例句：

1. 1. The temperature is constantthroughout the day.
   温度在整个白天都是恒定的。
2. 2. The river flows through a constantlandscape.
   河流穿过一片一成不变的风景。
3. 3. The constantrain made it difficult to work outdoors.
   持续的雨使得户外工作变得困难。