Ject对"null" 的正确翻译：adj. 无效力的,无效的,无价值的；n. 零；[计算机] 空。发音：[nʌl]。例句参考：A null field descriptor is the descriptor that forms the blank division in export. - 一个空白字段描述符是在输出中形成空格的描述符。；The process of inserting meaningless characters, such as null characters, zeros, or spaces, into the unused portions of a field, record, or fixed- length block of data. - 一种插入一些无意义字符的处理方法。例如，在一个字段、记录或固定长度数据块的不用部分插入空字符、零或空格。；The state or quality of being null. - 无效无效的状况或性质；