Haldane applied mathematical analysis to real world examples of natural selection such as the evolution of industrial melanism in peppered moths.

S.霍尔丹发表了一系列论文，将数学分析应用到真实自然选择例子，如粉蛾工业黑变病。

Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑是自然中普遍存在一种多型现象,也成为揭示物种在自然中与适应经典范例。