mongodb에서 여러 ID를 삭제하는 방법은 무엇입니까? { "_id" : ObjectId("51ee3966e4b056fe8f074f48"), "userid" : "66", "clientid" : "88", "deviceid" : "22", "timestamp" : "1374214822000"} { "_id" : ObjectId("51ee507ae4b056fe8f074f4a"), "userid" : "66", "clientid" : "88", "deviceid" : "22", "timestamp" : "1374214822000"} { "_id" : ObjectId("51ee51fee4b056fe8f074f4b"), "userid" : "66", "clientid" : "88", "deviceid" : ..