他们当时曾担心没有SAT成绩的学生如果被录取，是否证明与学校对学生的学习成绩所提出的要求相矛盾？
Would students admitted without the SAT prove unequal to the school's academic demands?
此外，如果你可以的话，设想一下，这个工程师的员工们在没有相应的蓝图的情况下被要求把铁杆树起来并开始装配钢铁桩子。
Furthermore, imagine, if you can, that this engineer's personnel are ordered to erect iron beams and assemble steel posts having never been provided with specific blueprints to follow.
如果没有这个要求，itemnumber列就无法保持惟一，因为多个行都可能被分配null值。
Without this requirement, the itemNumber column isn't guaranteed to be unique because multiple columns could be assigned a NULL value.
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