In places like Bali and New Guinea, people tend to slip in and out of sleep as they need it, napping more during the day, and getting up more at night.

在有些地方，例如巴厘岛和新几内亚，人们喜欢随时根据需要进入睡眠和醒来，白天时不时的打个盹儿，晚上却经常的爬起来不睡觉。

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"Research has found that women negotiate higher salaries for others than they do for themselves," he says, adding that people slip in and out of decision roles.

他表示：“研究发现，女性总是为他人而不是为自己争取更高的薪水。”他补充说，人们总是反复于决策者与被决策者这两个角色中。

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Barack Obama grew up learning how to slip in and out of different worlds - black and white, foreign and American, rich and poor.

奥巴马是在穿梭于截然不同的世界之间成长的，他学会如何在黑与白、异乡与美国、富与贫之间穿梭自如。

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The transitions are seamless and Michael Fagin's handsome sets slip in and out without fuss.

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We are blind to the hundred other creatures who slip in and out, opportunist tenants who may ultimately inherit the place.

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He said the pupils believed that making the toilets unisex would help them "to become places where you slip in and out to 'do your business' without hanging about".

BBC: Head defends unisex toilets