短語(yǔ)詞組短語(yǔ)null object reference 空對(duì)象引用的問(wèn)題;空對(duì)象引用;空對(duì)象引用的有關(guān)問(wèn)題;正在繙譯null pointer reference 空指針引用null object reference at line 行空對(duì)象引用;在行空對(duì)象引用null reference Null 蓡考null reference system [航]零基準(zhǔn)制;繙譯non -null reference 對(duì)於任何非空引用reference electrical null position 基準(zhǔn)電氣零位 返回 null reference