A professor at a certain university gave a lecture.

It is said that you must not build an overpass at the entrance of the university, and no one must walk to build an overpass, because the first step is to lift your legs, which is too tiring.

But digging an underground passage is different, because it is to save effort downward, but the length and distance of the two things are the same......

Wei Liheng also felt that what they said was very right and reasonable.

I have seen the negative one and two floors in the north and south, but I regret it when I come out, no tricks, climb it, go up to the second floor, walk along the trail, and push open a hidden door again.

This is the basement where the east and west wings are connected, and the style on both sides is the same, and at first glance it looks like a long corridor.

But this time, the room ......

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