The buttons that appear to the right and left of the URL bar provide a way to access Maemo's task selector and quit the program.

用户可以分别通过地址栏左右的按钮访问任务管理器和退出程序。

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The result selector therefore has access to every element of the first collection.

因此，结果选择器可以访问第一个集合的每个元素。

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This differs from the result selector in a non-group join, which cannot access elements from the first collection that have no match in the second collection.

这与无群组联结的结果选取器不同，如果在第二个集合中没有相符项目，该选取器就无法存取第一个集合中的项目。

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