例如，在去甲肾上腺素的刺激下，他们的心率加速得更快。
For instance, their heart rate shoots up more dramatically when stimulated by noradrenaline.
苏珊妮·张伯伦是该研究的带头人之一，她说道：“心率加速是因学生受到激励从而更加敏锐的特征。”
One of the leaders of the research, Suzanne Chamberlain, said: "This increase in heart rate is a sign that arousal encourages them (the students) to be more alert."
大家都知道，当我们竭尽全力时，心率会加速。
We all know that when we exert ourselves our heart rate increases.
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