我有点笨，在MongoDB中创建了一个集合，键名中有空格:{"_id":ObjectId("5065f84d00ea10c01e00003f"),"DateTime":ISODate("2012-09-27T15:19:00Z"),"PortName":"CL3-J","PortNumber":"40","AvgI/O/sec":"2024.0","array_serial":"xxxxx"}我正在尝试在mongoshell上定义一个函数来重命名它们:varmetricNames=["ProcessorBusy%","AvgI/O/sec","AvgXfer/sec"];varrena