Paroxysms of crying and unhappiness develop at roughly the same time of day or night and continue for hours for no apparent reason.

哭闹和不快大致发生在白天或夜晚的同一时间并持续数小时，但并没有明显的原因。

youdao

That child is always crying for no good reason.

那个孩子总是无缘无故地哭。

youdao

Last night, I began crying so sadly for no reason, really felt that I was in a street which had no end.

昨晚莫名其妙哭得如此伤心，真真切切感到自己走上了一条不归路。

youdao

She began to lose weight, became increasingly depressed to the point where she was crying for no reason, and could no longer face her job in the pet department of a local garden centre.

BBC: CJD: Anguish of a victim's family

But as she went down a list of symptoms, they were all there -- loss of appetite, trouble sleeping, waves of irrational anxiety, crying for no reason, loss of interest in work and hobbies, isolation and seclusion.

CNN: SHARE THIS