那位高手可以帮我讲解一下zero-neumann边界条件？
aThe homogeneous Neumann boundary condition indicates that predatorprey system is self-contained with zero population flux across the boundary 同类的Neumann边界条件表明食肉动物的牺牲者系统是独立性的以零的人口涨潮横跨界限[translate]
那位高手可以帮我讲解一下zero-neumann边界条件？