The maintenance thread looks at each connection in the pool, checks how long it has been in the pool, and how much time has elapsed since it was created and last used.

维护线程在池中查看每个连接，检查连接在池中存放的时间以及连接自创建和最后一次使用以来已经过多长时间。

youdao

I first encountered DFA several years ago when I worked on regular expressions, but it has been at least three years since I last used them so I spent some time researching the subject.

几年前，我在处理正则表达式时，第一次遇到了DFA，但是我已经至少有三年没有用过它，所以我花了一些时间来研究它。

youdao

This name was last used in 2004.

这个名称曾于2004年使用。

youdao

Last year, an American study showed such a link between Parkinson's and pesticides, like those used for killing insects.

VOA: special.2009.04.07

Last time we used printf generally to print a static string, like a hardcoded string, like "David," just for example's sake.

上次我们通常用“printf“,来打印一个静态的字符串，像硬编码的字符串“David“,这只是个例子。

哈佛公开课 - 计算机科学课程节选

We used iterative deletion in a relatively abstract setting, or not abstract, rather a play setting last time in which were choosing numbers.

我们在相对抽象的背景下探讨迭代剔除,其实也没那么抽象,比如上一讲,我们做的选数字的游戏

耶鲁公开课 - 博弈论课程节选

The route along the Garvaghy Road was last used by the Orangemen in 1997.

BBC: Orangemen staged a verbal protest at the security barrier

The steel and concrete bridge was opened in 1875 and was last used in 1968.

BBC: Demolition begins on Derbyshire accident bridge

The 17th Century stately home was last used by Middlesbrough College in 2008.

BBC: Acklam Hall redevelopment due to start by August