短語詞組短語bilinear Hilbert operator 雙線性Hilbert算子bilinear boltzmann operator 雙線性boltzmann積分算子bilinear differential operator 雙線性微分算子bilinear boltzmann integral operator 雙線性boltzmann積分算子bounded conjugate bilinear operator 共軛有界雙線性算子Hirota bilinear operator Hirota 雙線性算子bilinear Calderon -Zygmund operator 雙線性Calderon 返回 bilinear operator