假设我有一个具有此架构的Word模型varWord=newSchema({name:{type:String,required:true},disambiguation:String,partOfSpeech:{type:ObjectId,ref:"PartOfSpeech",required:true},attributes:[{type:ObjectId,ref:"Attribute"}],root:[{type:ObjectId,ref:"Word"}],language:{type:ObjectId,ref:"Language",required:true}});我想执行一个返