The cost can be one of the following metrics: execution time per query execution, user CPU time per query execution, and system CPU time per query execution.

这里所说的成本可能是下面的度量之一：每次查询执行的执行时间、每次查询执行的用户CPU时间、以及每次查询执行的系统CPU时间。

youdao

DB2 tracks two different types of temporal data: system time and business time.

DB 2跟踪两种不同类型的时态数据：系统时间和业务时间。

youdao

Lock wait Time: Time the system waited for locks during SQL statement.

Lock Wait Time：在执行此sql语句期间系统等待锁的时间。

youdao

He also needed time to organize a supply system to get to his forces the guns, bullets,food, and clothing they would need.

VOA: special.2009.08.27

It means that the properties of the system, the properties that describe the system, don't change in time or in space.

它的意思是指，用以描述系统的性质，不随时间或空间改变。

麻省理工公开课 - 热力学与动力学课程节选

No one, until this time, had suggested that a system would be subjected to quantization except for light.

在他之前，还没有人提出过,除光系统外的量子化系统。

麻省理工公开课 - 固态化学导论课程节选

Why is a university spending any time at all running a big-time sports entertainment system?

FORBES: Football Is Corrupting Our Universities - Again.

And it was in that context that I was sworn into office almost four years ago, at a time when the banking system was melting down, at a time when -- the month I was sworn in, we lost 800, 000 jobs, the worst crisis since the Great Depression.

WHITEHOUSE: Remarks by the President at Campaign Event -- 40/40 Club

At the same time, Bouvard said, installing a new, reliable ratings system will take time, both from a technological standpoint and in terms of getting a methodology that will satisfy advertisers and an industry sanctioning body.

FORBES: Magazine Article