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幻方
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幻方
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magic square
幻方
由n2(n≥3)个整数排成的n行n列方阵称为n阶幻方,如果方阵的任意横行、纵列以及主对角线上n个数之和都相等。又称魔方、魔阵或纵横图。
Mathematics
magic square
幻方
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,纵横图
vertical-horizontal diagram
纵横图,幻方
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sampling inspection
sampling inspection by attributes
sampling inspection by variables
sampling inspection having desired operating characteristics
sampling inspection of bulk materials
sampling inspection passed
sampling inspection plan
sampling inspection with adjustment
sampling inspection with screening
sampling integrator
sampling interval
sampling interval selection
sampling investigation
sampling item
sampling map in ore district
sampling method
sampling method for investigation
sampling methods
sampling moment
sampling observation particle size measurement
sampling of geological cores and samples
sampling of image
sampling of ore for mining technology
sampling of ore for technological test
sampling of random variable
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