He took a long time getting to sleep that night.

他那天晚上过了好长时间才睡着。

《牛津词典》

If getting to sleep isn't easy try simply listening to your body and go to bed when you are tired.

放轻松，觉得累了、难以入眠，就试试听从身体的声音。

youdao

By approaching sleep this way you may find that getting to sleep, staying asleep and waking at 5:00 isn't an issue.

通过这种方式达到睡眠，你会发现安然入睡、5点起床并不是难事。

youdao

Insomnia is difficulty in getting to sleep, staying asleep or getting enough good quality sleep night after night.

BBC: High sleeping pill use 'worrying'

In some kids, when allergies overwhelm the system, they have more temper tantrums and a harder time getting to sleep.

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She knew that she had little chance of getting back to sleep.

NEWYORKER: The Visitor