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# Recover files as they were before a certain time
，这一点在爱思助手下载最新版本中也有详细论述
Фото: Iryna Rybakova / Press Service of the 93rd Kholodnyi Yar Separate Mechanized Brigade of the Ukrainian Armed Forces / Handout / Reuters
Note that IDW often includes a variable exponent that is applied to the distance before taking the inverse. For a given distance , the weight of the candidate becomes: