用一个合并操作，可以指定一个主记录以及要合并的记录。

With a merge operation, you specify a master record along with the record to merge.

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一次可以同时合并三个记录。

You can merge up to three records at a time.

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从合并的记录，我们应该有我们需要的所有信息。

From the merged record, we should have all of the information we need.

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从合并的记录，我们应该有我们需要的所有信息。

From the merged record, we should have all of the information we need.

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