fail a test造句

• Do you ever worry that you ' ll fail a test
  你曾经担心考试会不及格吗？
• Every time you fail a test , it s doubly difficult next time . and if you fail the third time , it s six times more difficult
  每一次你没有通过考验，下一次的难度就会加倍，如果到了第三次还没通过，困难度就变成六倍。
• A statistics update is initiated whenever the statistics used in a query execution plan fail a test for current statistics
  每当查询执行计划中使用的统计信息没有通过针对当前统计信息的测试时就会启动统计信息更新。