下来你就只需要保持不睡觉。

Now you just have to stay up.

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例如，我们最好保持与平时一样的生活方式，即按时起床，按时睡觉，这样就不会使得我们的生活方式不律。

For example, we had better keep the same lifestyle as the usual, like get up on time, go to bed on time, so that we would not make our life irregular.

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研究者在一个光线充足的房间里，分别对睡足八小时和保持31小时不睡觉的志愿人员进行拍照。

Volunteers were photographed after eight hours sleep and again after being kept awake for 31 hours. The photographs were shot in a well lit room.

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