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的论文，将数学用到真实世界的选择例子，如粉蛾工业黑变病的进化。

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

昆虫黑化界中普遍存在的一种多型现象,也成为揭示物种在界中进化与适的经典范例。