题目选项分析

In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings, perhaps violent without being grounded in mental disease, and genuine manic-depressive psychosis.

In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes between mood swings, which may be violent without being grounded in mental disease, and genuine manic-depressive psychosis.