One difficulty is that almost all of what is calledbehavioral science continues to trace behavior tostates of mind, feelings, traits of character, humannature, and so on.
译文:
难题之一在于,所谓的行为科学几乎仍然是从心态、情感、性格特征、人性等方面去寻找行为的根源。
点睛:
该句中that引导的是表语从句,其中还包含what引导的主语从句,作表语从句的主语。Trace sth. to...意为“追溯某事物的根源…”。
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