It must not exist 它绝对不能存在
He was too shrewd to believe that it must exist.
他坚信一定有——这一点上,他有点机灵过头了。
In fact, it's the primary key of the dw_authors table, so it must exist.
事实上这是dw_authors表的主键,因此必须有。
The process object is not shown in Figure 1, but it must exist and make a reference to the CICS transaction QCTL in this case.
虽然该process对象并没有显示在图1中,但它必须存在并引用本例中的CICS事务QCTL。
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