In this form, we can tell Domino which field is the key field and how this field maps to the DB2 key column.

在该表单中，我们可以告诉Domino哪个字段是关键字段，以及如何将该字段映射到DB 2键列。

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First, you usually want to have a (surrogate) object identifier that maps to the primary key of the corresponding database table.

首先，您通常要具有一个映射到对应数据库表主键的(代理)对象标识符。

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To begin using the Google Maps APIs, you must first sign up to receive an API key from the Google Code site.

要开始使用Google Maps API，必须先在Google Code站点中注册以获得api密钥。

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In the late 16th century Dutchmen Cornelius and Frederik Houtman tried to swipe the key to Portugal's trade monopoly in the East Indies--detailed maps of that part of the globe--and landed in jail for a brief time.

FORBES: Atlas Unbound

Writing in the Journal of Animal Ecology, researchers suggest this shows a capacity to store maps of key sites.

BBC: Sharks navigate using 'mental maps'