In the case of a library, the default may be by author, because that is how many people look for specific books.
在图书馆的例子中，缺省方式可能是按作者搜索，因为许多人在寻找特定书籍时都是这样做的。
How many people attending conferences in Warsaw, for example, get to visit the spectacular university library (pictured, above)?
例如，到华沙参加会议的人当中有多少人去参观了壮观的大学图书馆？
We used an undercover camera to see how many people used the library and what were they doing.
我们使用了一个微型摄影机，来观察每天有多少人使用图书馆，而且他们在都做什么。
We used an undercover camera to see how many people used the library and what were they doing.
我们使用了一个微型摄影机，来观察每天有多少人使用图书馆，而且他们在都做什么。
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