Have you ever had difficult sleeping at night?

你曾经在晚上睡觉失眠吗？

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African sleeping sickness, an especially difficult and challenging killer, provides a good example.

非洲昏睡病尤其难以控制，是具有挑战性的一个杀手，该病是一个良好的例证。

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'Because it's so easy to receive emails constantly, and get notifications from, it becomes more difficult for us to separate our waking and sleeping lives.'

因为持续地接收电子邮件很容易，又能随时听到智能手机的提示音，所以我们要将清醒和睡着时的生活分开变得困难起来。

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