varying speed

例句：

1. 1. The temperature varies throughout the day.
   温度在一天中不断变化。
2. 2. The color of the flowers varies depending on the season.
   花朵的颜色根据季节而变化。
3. 3. The amount of sunlight that reaches the earth varies greatly from place to place.
   到达地球的阳光量在不同地方有很大差异。