两个囚犯手铐在一起时却分别往灯柱两边跑，结果没跑成。
Two prisoners bungled an escape bid after running either side of a lamppost while handcuffed.
再后来，我问另一位成功的朋友，她会站在哪一边。
Later, I asked another successful friend which side she was on.
把它想象成一个跷跷板——任何一边都不会碰到地面，因为两边重量是相等的。
Think of it like a seesaw — neither side is touching the ground because the weight on each side is identical.
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