英语翻译Why are manhole covers round rather than square?The answ

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英语翻译
Why are manhole covers round rather than square?
The answer interviewers consider the best is that a
square cover could fall into its hole,injuring someone or getting lost underwater.This is because the diagonal of a square is 根号2 (1.414...) times its side.Should you hold a square manhole cover near-vertically and turn it a little,it falls easily into its hole.In contrast,a circle has the same diameter in all directions.The slight recess in the lower part of the cover prevents it from ever falling in,no matter how it's held.

井盖为什么是圆的不是方的?
接受采访的人给出的答案中,最佳答案是这样解释的：一个方井盖会掉到洞里去,可能会伤人,也可能就被下水道的水冲走了.这是因为方井盖的对角线是它侧边的根号2 (1.414...)倍.所以你应该把一个方井盖几乎完全垂直地放置,一旦挪动一点,它就会掉下去.同放井盖相比,圆井盖从任何方向和角度看它的直径都几乎是一样的.不管它怎么放置,下方的小坑都可以阻止它掉下去.
希望对你有帮助!~

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