error in variable model

例句：

1. 1.The weather can be quite variable in this region.
   这个地区的天气可以相当多变。
2. 2. Variables such as temperature and humidity play a crucial role in the growth of plants.
   温度和湿度等变量在植物生长中起着至关重要的作用。
3. 3. The team's performance was highly variable during the match.
   球队在比赛中的表现非常不稳定。