后天的

We do not know which behavioural traits are inherited and which acquired.

我们不知道哪些行为特征是遗传的，哪些是后天养成的。

This was true whether applied to a congenital defect, such as syndactyly, or an acquired defect, such as a burn contracture.

把它们应如并指的先天缺损或是烧疤痕挛缩类后天缺损的修，都没错。