Control only needs to flow once from a source element to a target element.

从源元素到目标元素，控制只需要流动一次。

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IsSourceConsumed: allow or disable further rules execution on this source element.

isSourceConsumed：允许或阻止在该资源元素上的进一步规则执行。

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After they are mapped, the transformation merges the changes of the source element into the mapped target elements.

在它们映射之后，转换会将源元素的更改合并到映射的目标元素中。

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As a novel, global data source Argo has also become a central element in operational oceanography and in basic research and has great value in education.

UNESCO: World Water Assessment Programme (WWAP)

The device's primary source of neutron radiation was the radioactive element californium, but the stream of neutrons produced by the californium was multiplied by passing it through a lattice of highly enriched uranium U-235, whose nuclear fission released additional neutrons.

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The second element of the SVSC is the way it provides open source documentation of effective start-up practices.

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