如何在Scala中实现多态方法的最小模拟？

trait Animal {
  def sound(): String
}

class Dog extends Animal {
  def sound(): String = "Woof"
}

class Cat extends Animal {
  def sound(): String = "Meow"
}

def makeSound[T <: Animal](animal: T): String = {
  animal.sound()
}

val dog = new Dog()
val cat = new Cat()

println(makeSound(dog))  // 输出：Woof
println(makeSound(cat))  // 输出：Meow