Only check Facebook or Twitter once an hour (or every two hours); keep them closed other than at their allotted times.

每个小时只看一次Facebook或者Tweeter（或者每两个小时一次）；把它们关上而不是一直关注。

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After opening the eyes for this fraction of a second, close them again quickly, still remembering the color, and keep them closed until they again feel rested.

眼睛睁开瞬间之后，再迅速的闭上它们，仍然追忆色彩，保持眼睛闭合，直到感觉它们又放松了。

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It began with the approach of two or three, who hung about the closed wooden doors and beat their feet to keep them warm.

开始只来了两三个人，他们在关着的木门附近溜达，一边跺着脚取暖。

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Napolitano said parents of children whose schools closed should keep them at home instead of taking them out in public.

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If a group of like-minded people develop and enforce their own rules, they are likely to believe in them, which means they will keep them in mind even when the door is closed.

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Mr Newman said officials had contacted schools that closed on Monday to ask them whether there was anything more they could do to keep them open.

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