It is bounded above by a road that overhang it and below by a path.
该地以一条公路为界，公路悬于该地之上，通过一条小路下来。
These steps are bounded—the value won't go above the upper limit set by the program or below the lower limit.
每一步都是有界的，数值不会超过程序设置的最上限，也不会低于程序设定的最下限。
These steps are bounded—the value won't go above the upper limit set by the program or below the lower limit.
每一步都是有界的，数值不会超过程序设置的最上限，也不会低于程序设定的最下限。
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