Insomnia is a sleep sustained considerable time unsatisfactory quality or quantity of symptoms, difficulty falling asleep, and sleep fitfully and wake up early is the most common symptoms of insomnia.

失眠是一种持续相当时间的睡眠的质或量的令人不满意的症状，入睡困难、睡眠中断易醒和早醒是失眠患者最常见的症状。

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The app has been indispensable to our son Khalil’s sleep; with the sound on, he sleeps fitfully, but without it we have the sort of disaster that would make Jerry Bruckheimer proud.

该应用程序是我们的儿子哈利勒睡觉必不可少的工具； 伴随着那些声音，他睡的很舒服，但是没有它，我们就会遇到一些使 杰里布鲁克海默自豪的麻烦。

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The researchers acknowledged this may pose a dilemma to new mothers, given that infants sleep so fitfully.

研究人员承认这可能会让新妈妈们为难，因为婴儿的睡眠是断断续续的。

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Although most of the riders are worn out, they sleep fitfully among the swarming insects.

FORBES: Journey: Painful pleasure

There's another reason for the entrepreneur to sleep fitfully.

FORBES: Magazine Article

They sleep only fitfully among the swarming insects, as bats swoop through the rafters.

FORBES: Painful pleasure