用批处理实现文件备份器V2.3

echo           │        分隔。该时间用24小时制(既从00:00到23:59)        │
echo           │                                                        │
echo           │        的小时:分钟格式表示。                           │
echo           │                                                        │
echo           │            例如：想分别在上午8点30分和下午4点进        │
echo           │                                                        │
echo           │        行备份，请在同一行输入8:30 16:00(注意：两       │
echo           │                                                        │
echo           │        个时间点之间有一个空格)                         │
echo           │                                                        │