Opening and closing connections is an expensive process affecting application or database performance and the use of connection pooling helps eliminate most of that overhead.
打开和关闭连接的过程开销较大，会影响到应用程序或数据库的性能，而使用连接池就可以消除大部分这样的开销。
The resolution (opening up a connection, pulling down content, closing the connection, and so on) also may slow down the parsing process.
解析（打开连接、下载内容、关闭连接等）也会减慢分析进程的速度。
When holding an activity, such as Olympic Games, the essence of it is the process and spirit of the competition, instead of the opening or closing ceremony.
在举办活动的时候，比如说奥运会，精髓在于比赛的精神跟过程，而不是开幕和闭幕仪式。
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