Excel默认日期时间格式yyyy-mm-dd hh：mm：ss与yyyy-mm-dd hh：mm

I'm using Excel 2010 or Excel 2007 to import CSV file with date/time information. The time stamp in my CSV file have the following format: yyyy-mm-dd hh:mm:ss. (ex: 2015-07-17 12:34:56)I'm using Excel 2010 or Excel 2007 to import CS