sufficiently certain

Indeed, although certain minor functions may use only a small part of the brain at one time, any sufficiently complex set of activities or thought patterns will indeed use many parts of the brain.

事实上，虽然在某一时间，一些小功能可能只用到一小部分大脑，但是任何非常复杂的活动或思维模式确实会用到大脑的很多部分。

On the other hand, creating a PreparedStatement object introduces a certain amount of overhead, so, ideally, the statement's lifetime will be sufficiently long to compensate for this overhead.

在另一个方面，建立一个 PreparedStatement 对象会带来一定量的系统开销。 所以，在理想情况下，这条语句的生命周期应该足够长，以补偿它所带来的系统开销。

By sufficiently studying and applying the present information searching technology, we design an information searching machine, based on text analysis, with intelligence in a certain degree.

文章在充分考虑并运用现有的信息搜索技术的基础上，设计了一个针对文本的，有一定智能化的信息搜索机，最后进行了性能分析。