We do not know, in most cases, how far social failure and success are due to heredity, and how far to environment. But environment is the easier of the two to improve.
在大多数情况下,我们不知道社会上的失败和成功在多大程度上是由遗传造成的,又在多大程度上是由环境造成的。但是环境是两者中比较容易改善的。
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Success