问题描述：
英语翻译
a rope is cut off 4 times ,and each time a half part of the left is cut off,when the cutting comes to the 4th time,the length of the part left is 2 meters
a rope is cut off 4 times ,and each time a half part of the left is cut off,when the cutting comes to the 4th time,the length of the part left is 2 meters
问题解答：
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