arousal
n. 唤起，（尤指性欲的）激起；（睡后的）清醒，醒来
例句
Thinking angry thoughts can provoke strong physiological arousal.
想生气的事情能激起强烈的生理兴奋。
《柯林斯英汉双解大词典》
The processes of arousal and concentration give attention its direction.
觉醒和集中的过程为注意力提供了方向。
Arousal is at first general, with a flooding of impulses in the brain stem; then gradually the activation is channeled.
一开始觉醒是普遍的，在脑干中有大量的脉冲，然后激活作用逐渐被输送。
