He'll enter the manic phase any moment now.

他现在随时有可能进入癫狂状态。

Someone suffering from a bipolar disorder may flip back and forth between normal and depressive and manic phases within a single day or week or month.

患有双相情感障碍的人可能会在一天、一周或一个月内在正常、抑郁和躁狂阶段之间来回切换。