external stimulus

基本解释

Use external stimuli.
使用外在刺激。
In brain-imaging studies, brains of introverts show more activity in response to external stimuli.
對大腦成像的研究發現，內曏者的大腦對於“外部刺激”表現出較爲活躍的反應。
It can be useful to filter out external stimuli if you are writing an email in a noisy coffee shop, for example, or are searching for a camouflaged insect in a rainforest.
例如，要是你在在嘈襍的咖啡館裡寫一封電子郵件或在雨林裡搜尋一衹偽裝的崑蟲，能過濾掉外部的刺激就很有用。

Using these bio-transistors, researchers gain access to data not previously available (like whether an individual cell has been exposed to certain external stimuli), in addition to allowing them to control basic functions like cellular reproduction.
ENGADGET
An external stimulus such as music can actually block some of the internal stimuli trying to reach the brain—such as fatigue-related messages from muscles and organs.
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