Leg cramps generally occur, often in a time of rest or sleep, such as cold, calcium deficiency, osteoporosis may cause.

一般人发生腿抽筋，往往是在休息甚至睡眠的时候出现，比如受凉、缺钙、骨质疏松都可能引起。

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We didn't ask 'Why didn't you get enough rest or sleep?' said Lela McKnight-Eily, an epidemiologist for the Centers for Disease Control and Prevention who led the study.

负责此项研究的美国疾病防控中心的流行病学家莱拉•麦克耐特-艾莉说：“我们并没有提出‘为什么你没有得到足够的休息或者睡眠？’ 这一问题。”

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Cancer -related fatigue (CRF) is one of the most common side effects of breast cancer patients receiving chemotherapy, can not be relieved by rest or sleep and impacts on quality of life badly.

癌因性疲乏是乳腺癌辅助化疗患者最常见的副反应，持续时间长，不能通过休息和睡眠来缓解，严重影响了患者的生活质量。

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Programmers--sorry, seamen--hired from places like India and Russia would have their own cabins, work eight- or ten-hour stretches on either a day or night shift and have the rest of the time to sleep, play shuffleboard or take a water taxi to shore.

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