单词	pencil of parallel planes
释义
随便看	K2-group K2-group of a division ring K2-group of a field K2-group of integral number ring K2-group of rational number field Q K2-group of ring Z/nZ K2-groups of commutative H-rings K2-groups of some semilocal rings K2(R)的子群C(R，I) K2函子 K2群 K2群中的记号d(α，β) K2群中的记号e(u，v) K2群中的记号{u，v} K2群中的记号〈a，b〉 K2，K1，K0群的正合列 K3 surface K3曲面 Kac-Moody algebra Kac-Moody algebra g(A) Kac-Moody algebra of affine type Kac-Moody algebra of finite type Kac-Moody algebra of hyperbolic type Kac-Moody algebra of indefinite type Kadomtsev-Petviashvili equation

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