variable variate

例句：

1. 1. The weather has variated significantly since yesterday.
   自昨天以来，天气已经发生了显著的变化。
2. 2. The population of the city has variated over the years.
   多年来，该城市的人口已经发生了变化。
3. 3.The recipe for this dish requires careful variatement.
   这道菜的食谱要求仔细调整。