So, suppose I have a theory that the reason why some children have autism, a profound developmental disorder, is because their mothers don't love them enough.

假设我提出了一个理论,阐述了儿童之所以患有自闭症，一种严重的发展障碍，是因为孩子缺乏母爱。

耶鲁公开课 - 心理学导论课程节选

And one factor in Parkinson's is too little of a neurotransmitter known as dopamine.

引起帕金森症的一个病因,便是严重缺乏一种叫做多巴胺的神经递质

耶鲁公开课 - 心理学导论课程节选