variable address

例句：

1. 1. The temperature is a variable that affects the outcome of the experiment.
   温度是一个可变因素，影响实验的结果。
2. 2.The amount of rainfall is a variable that can affect the growth of crops.
   降雨量是一个可变因素，可以影响作物的生长。
3. 3. The composition of the soil is a variable that can influence the yield of the crop.
   土壤成分是一个可变因素，可以影响作物的产量。