The big ones are mentally slower.

当然，大孩子上往往比较迟钝。

Thomas Edison as a child was sickly, poor, and believed to be retarded by his teacher.

托马斯·爱迪生小时候体弱多病，家境贫困，还被老师认为迟钝。

Because another aspect is if I ask you a simple question, would you want your intellect to be sharp or blunt?

另一个方面， 我问你一个简单问题，你希望你敏锐还迟钝？

And in the years since then, in 2002, the Supreme Court ruled that a person at his level of mental retardation cannot be executed.

此后几年里，2002年，最高法院裁定，对于像他这样迟钝程度人不能被处决。

They understand this process well enough to intervene, to test newborns, for example, and treat them for a genetic condition that used to lead to mental retardation.

他们对这一过程了解得足够深入， 可以进行干预， 例检测新生儿，并治疗一种过去会导致迟钝遗传疾病。