But the system had a critical flaw : it took hours to perform a single check-in! 但是系统却有重大的瑕疵:执行一次check-in要花费数小时!
At a large retailer, adding a missing index to a small, 2,000-row table in an8 TB warehouse reduced the elapsed time of a critical decision support query from three hours to two minutes. 在一家大型零售商的8TB数据仓库中,在一个2000行的小表上添加一个索引之后,一个决策支持查询花费的时间从三小时一下降到了两分钟。
Hiding cubs well is critical, since she may be away hunting for24 hours or more. 将幼崽藏匿得当是至关重要的,因为她可能会离开24小时或更长时间来猎食。
The critical condition for conversion of stamen fertility are 8 hours of day time and 14 ℃. 雄蕊育性临界转换光日照为8h,温度为14℃;
In addition, if you're upgrading a critical app, it's always best to do so during off-peak hours. 此外,如果您正在升级关键应用程序,则在非高峰时进行升级总是最佳选择。