From past work, scientists know that mice that lack the molecular receptors needed to detect CRH are less anxious than normal animals.

从之前的科研工作中，科学家了解到如果一个老鼠缺乏能够探测到CRH的分子受体，那么这个老鼠会比正常的老鼠显得更不那么焦虑。