船vx = v0/Sqrt[2],vy = v0/Sqrt[2] - vw水vw = u0 - k*(h/2 - x)^2 u0,在西岸x=0,水速为0,有u0 = k*h^2 u0位移：x = Int[vx,0,t] y=Int[vy,0,t] 由上述关系解得：x=(t*v0)/Sqrt[2],y=t*(-u0 + v0/Sqrt[2] + (u0*(h/...原来那个y有问题，看新的吧,轨迹为x[t]和y[t]组成的参数方程