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显示作为背景密度的散度

    
Wolfram Language code: div[x_, y_] = Div[{Cos[x + y ^ 3], Sin[y + x ^ 3]}, {x, y}];
Wolfram Language code: StreamDensityPlot[{{Cos[x + y ^ 3], Sin[y + x ^ 3]}, div[x, y]}, {x, -2, 2}, {y, 0, 2}, StreamPoints -> Fine, ColorFunction -> "MintColors", MaxRecursion -> 2, StreamStyle -> Black, StreamColorFunction -> None]