In his defense he alleged temporary insanity.

他伪称一时精神错乱,为自己辩解。

There was a streak of insanity in the family.

这个家族有精神错乱倾向。

At the murder trial, he pleaded insanity.

在凶杀案程中，他以精神失常为由进行抗辩。

The legal concept of insanity is of a different nature from the medical.

精神错乱法律概念与医学概念在性质上是不同。

He'll surround himself with the finest lawyers money can buy - and they'll concoct a doozy of an insanity plea.

他会为自己请来能用金钱收买到最好律师，这些人会罗列出一大堆证明他疯了由。