Unity 间隔一段时间读出字符串的每一个字符

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Test : MonoBehaviour
{
	private string str;
	// Use this for initialization
	void Start () {
		 str="的感觉是的空间任何，涣发";
		 StartCoroutine(Read());
	}

	IEnumerator Read()
	{
		for (int i = 0; i < str.Length; i++)
		{
			Debug.Log(str[i]);
			yield return new WaitForSeconds(2);
		}
		
		
	}
	
	
}