free variability

例句：

1. 1. The genetic makeup of the species is characterized by its free variability in size and shape.
   这个物种的遗传特征是其大小和形状的自由变异。
2. 2.In evolutionary biology, free variability is a key concept that explains how organisms can adapt to changing environments.
   在进化生物学中，自由变异是一个关键概念，它解释了生物如何适应不断变化的环境。
3. 3. The study of free variability has led to new insights into the genetic basis of disease susceptibility.
   对自由变异的研究已经揭示了疾病易感性的遗传基础的新见解。