diffusion equation with a source term. 此模型由一个单一的具有源项的对流扩散方程组成. 来自互联网 3 . The advection and diffusion of the pollutants were basically reasonable. 污染物在近海对流、扩散情形基本合理. 来自互联网 4 . To convey horizontally by advection . 平流传递通过平流水平传递. 来自...