From the concept and the determination methods of core-presses, put forward to the concept of collection key presses, and discusses application of core-presses and key presses in book purchasing.

从核心出版社的概念和测定方法入手，提出了馆藏重点出版社的概念，探讨了核心出版社和馆藏重点出版社在图书采访中的应用。

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This is yet another class that supports sorted collection of objects where each sort key must be unique.

这是另外一个可以支持排序的对象集合的类，其中每个排序键必须是唯一的。

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All hash-based collections assume that an object's hash value does not change while it is in use as a key in the collection.

所有基于散列的集合假设，当对象的散列值用于作为集合中的关键字时它不会改变。

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They said working to improve sanitation, nutrition and HIV prevention, as well as better data collection, in these areas was key.

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Nintendo also has been able to offer all of its key franchises in this collection, including Mario, Metroid, Legend of Zelda, Donkey Kong, Pikmin and Yoshi.

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Key pieces from the collection will travel to Hong Kong, London, New York and Rome before returning for exhibition in Geneva in advance of the sale.

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