黎明一来，我们必须起床。这是锻炼的时间。
When daylight comes, we must get up. This is the time for exercise.
我们必须在晚上九点前上床，早上八点起床。
由于地点遥远，我们必须在5：20起床赶往目的地，虽然有点不适应这么快的生活节奏，但是对我们来说也是一种考验。
Hurry to a destination since the place is distant, we must get out of bed in 5:20, be also one kind of ordeal to us although not adapting to so quick circadian rhythm a little bit.
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