Each item in the repository has a unique item id, which can be used as a key to retrieve it.

存储库中的每个项具有唯一的项id，可将其用于检索项的键。

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For instance, is your toy intended to be a unique item, perhaps made by one person from start to finish?

例如，你打算把你的玩具设计成为一个独特的项目，也许从始至终由一个人人来完成？

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The individual item states are each given unique state identifiers.

各个项状态被赋予唯一的状态标识符。

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Woodland, a Manhattan Project scientist, came up with the idea for bar codes while running his fingers through the sand, trying to figure out how to put a unique code on every item of merchandise that could be easily scanned by a mechanical device.

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Each item can be unique--"ideal for such documents as financial statements for retirement services investors, " says Lew Waltman of R.

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If you get out of the range of the GPS tracking system, it will help locate your item on a map with its unique last-seen map pin-drop feature.

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