Of course, you may want to do more than just one or two tasks to improve a facet, but choose only the most important ones to be made daily.
当然，你可能在丰富某一方面的时候想选择更多的任务，但是请挑选就每天生活生活而言最重要的那些事情。
It allows you to receive a stream of events from the parser, similar to SAX-style parsing, but with the ability to control the flow of events, by only "pulling" the ones you want.
它允许您从解析器接收事件流(类似于SAX风格的解析)，但是能够通过选择所需的事件来控制事件流。
Sure, it's fine for a handful of records, but you don't want to retrieve all books from a bookstore to find only the ones written by Bob Swart.
当然，对于少量的记录，这样做很好，但是您显然不希望只是为了找到Bob Swart编写的书而检索某个书店中的所有的书。
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