Students are facing a battery of new tests to get into Oxford and Cambridge amid continuing fears that A-levels fail to mark out the best candidates.

在担心优秀的成绩并不能选出最好的申请人的情况下，学生们要进入牛津和剑桥需要面临一系列新的测试。

The Association of School and College Leaders told the Times Educational Supplement that A-levels in foreign languages, for example, could be scrapped.

学校联盟告诉时代教育副刊说，外语的英国等级考试可能取消。

He also added that colleges can no longer rely on the existing A-level to identify the best candidates because A-levels are failing to prepare students for degree courses。

他还称高校不能仅仅依赖现存的A-Level水准证书来选拔人才，因为它并不能保证学生可以通过大学学位课程。

Ischemic preconditioning 24 hours before ischemia-reperfusion injury increased VEGF-A levels and substantially decreased the number of apoptotic retinal cells.

在缺血-再灌注损伤前24小时进行缺血的预处理可增加VEGF-A水平并大量减少凋亡的视网膜细胞数量。