单词	direct sum
释义	direct sum noun : cartesian product compare direct product Word History First Known Use 1908, in the meaning defined above
随便看	dukhobor dukhobors duking dukka dukkah duku dukw dul dulan Dulat dulbert dulcamaras dulce dulce de leche dulce est desipere in loco dulce et decorum est pro patria mori dulcet dulceter dulcetest dulcetly dulcets dulcetter dulcettest dulcian Dulciana

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