她是那种习惯每晚睡八个小时的人。

She was a person accustomed to having eight hours' sleep a night.

《牛津词典》

我相信每晚睡八个小时是重要的。

I believe it's important to sleep for 8 hours every night.

youdao

他着手进行了一项实验，要求志愿者们每晚睡大约七个半到八个小时，一个星期后再将睡眠时间调整为六个半到七个小时。

He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.

youdao

他着手进行了一项实验，要求志愿者们每晚睡大约七个半到八个小时，一个星期后再将睡眠时间调整为六个半到七个小时。

He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.

youdao