variation of fit

例句：

1. 1. The species has undergone several variations over the years.
   这个物种多年来经历了几次变化。
2. 2. Variations in temperature can affect the growth of plants.
   温度的变化会影响植物的生长。
3. 3. The genetic makeup of a population is a reflection of its variation.
   一个群体的遗传构成反映了其变异。