双语例句
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So, in other words, a biological stressor without a psychological component.
换句话说，没有掺杂心理因素的生物压力。
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But there may also be a psychological component. The stress of a recession can make people less likely to bare their arms.
但这也可能有心理因素：经济下滑所造成的压力使人们更不愿意伸出胳膊献血。