time-variant

例句：

1. 1.The weather can vary greatly from day to day.
   天气从一天到另一天可以有很大的变化。
2. 2.The temperature is time-variant in this region.
   这个地区的温度随时间变化。
3. 3.The process of time-variant analysis is complex.
   时间变异分析的过程很复杂。