/// <summary>
/// 读取所有声音文件
/// </summary>
private List<string> ReadTxt()
{
    List<string> audiosList = new List<string>();
    string path = Application.streamingAssetsPath + "/Audios.txt";
    string[] strs = File.ReadAllLines(path);
    for (int i = 0; i < strs.Length; i++)
    {
        string tmpLine = strs[i];
        if (!string.IsNullOrEmpty(tmpLine))
        {
            audiosList.Add(tmpLine);
        }
    }
    return audiosList;
}