不管你打算如何消磨时间，有件事是可以肯定的，即当你抵达目的地时，你感到精神焕发，毫无倦意。
However you decide to spend your time, one thing is certain: you will arrive at your destination fresh and uncrumpled.
有件事情是可以肯定的，天空中有许多飞行物体是我们无法鉴别的。
One thing is for certain, there are objects flying in the sky that we can't identify.
有件事情是可以肯定的，天空中有许多飞行物体是我们无法鉴别的。
One thing is for certain, there are objects flying in the sky that we can't identify.
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