已知 $x=\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}\mathrm{，}y=\frac{\sqrt{3}-\sqrt{2}}{\sqrt{3}+\sqrt{2}}$，则 $\frac{x}{y}+\frac{y}{x}=$＿＿＿＿＿．