Oxygen is an active stimulus of cerebral blood vessels.

氧是脑血管的一种有效刺激。

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Functional MRI charts changes in brain blood flow, allowing researchers to see which brain areas become more active in response to a particular stimulus.

功能性MRI图在脑血流方面会有所改变，从而容许研究者观察针对特定的刺激，大脑中哪一个部分变得更加活跃。

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And because of the stimulus package consumption activities are reasonably active."

VOA: standard.2009.10.16

The malaise in the U.S., where stimulus is still the word of the day, stands in contrast to active recoveries in Europe and Asia, where governments are actively removing stimulus.

FORBES: Dollar Dragged Down As U.S. Economy Fails To Resuscitate

The president instituted his job program in 2009: His big stimulus plan, backed by the Federal Reserve's active monetary creation.

CNN: Both parties abandon the jobless

Given the massive infrastructure spending anticipated under the Obama administration's new stimulus plan, the market has a need for more than one active insurer, Dinallo said Wednesday.

FORBES: Magazine Article