空项 meaning in English

null term

The submission definitely fails if any column in the form appears empty
表格如果出现空项，则不允许提交。
Not all the non - null entries in delegates are instances of the same delegate type
中的所有非空项都是同一委托类型的实例。
If you submit an application that leaves any column in the form empty , your application will not be accepted by the system
考生逐项填写在线申请表。表格出现空项，将导致提交失败。
If neither medianame nor mediadescription is specified when a media header is written , the media header field corresponding to the blank item is empty
如果写入媒体标头时未指定medianame或mediadescription ，则与空项对应的媒体标头字段将为空。
A little extra work would also allow tables containing full struct definitions ; a little more would ensure that space isn t wasted at the front of the array with useless empty entries
我们还要实现另外一些任务：让这个表包含完整的结构定义；还要确保这个数组前面没有空项，这样就不会浪费空间。