Babies need a lot of sleep and this is particularly true of newborns.
婴儿需要大量的睡眠，新生儿尤其如此。
We all know that babies can generate a lot of wetness while they sleep — thus the need for a waterproof cover.
大家都知道宝宝睡觉时候会尿床什么的，所以我们需要防水的床罩。
Babies need a lot more sleep of course, lying in their cots for up to 19 hours a day.
当然婴儿们需要很多的睡眠时间，他们在睡梦中的时间可达到一天19个小时。
Research shows that the amount of sleep which people need in order to keep healthy 37 a lot.
研究表明，保持健康需要的睡眠数量是因人而异的。7小时是平均数。
Research shows that the amount of sleep which people need in order to keep healthy 37 a lot.
研究表明，保持健康需要的睡眠数量是因人而异的。7小时是平均数。
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