variable profit

例句：

1. 1. The temperature is a variable factor in the weather forecast.
   温度是天气预报中的一个可变因素。
2. 2. The market demand for this product is highly variable.
   这种产品的市场需求高度可变。
3. 3. The performance of the team is highly variable due to the absence of key players.
   由于缺少关键球员，团队的表现高度可变。