They developed a tightly coupled system that enabled them to generate rows of drops by using computer-controlled manifolds.

他们开发了一个紧耦合系统可以让他们通过使用计算机控制的集合管来产生多行的水滴。

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As an alternative, you can generate rows in a ratio that is based on the number of rows that you generate for another table.

此外，您可以依照某个比例产生资料列，而该比例是以您对其他资料表产生的资料列数为基础。

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Generate the access plan and see what the optimizer estimates the total cardinality (Number of rows) returned by the query will be.

生成访问计划，查看优化器对该查询返回的总基数(行数)的估计值。

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