可实时行使及无条件限制的权利 presently exercisable and unconditional right
限定 prescribe [set] a limit to; limit; restrict; determine; define; qualify 限定参观人数为50人 limit the number of visitors to fifty; 限定时间完成 prescribe a time limit for fulfilment; 每次发言限定在15分钟之内。 speeches were limited to 15 minutes each.; 限定成分 determinant; 限定词 determiner; attribute; [计算机] qualifier; 限定动词 finite verb; 限定价格 limit price; 限定语 qualifier
You can define frequently used joins , projections , union queries , and select queries as views so that users do not have to specify all the conditions and qualifications every time an additional operation is performed on that data 可以将常用联接、投影、 union查询和select查询定义为视图,以便使用户不必在每次对该数据执行附加操作时指定所有条件和条件限定。