1. "O yes, certainly, " said the girl with a sort of demure alertness which was somewhat amusing. “呵，好，当然，”那女孩说，她表现的那种认真的，灵敏的样子，看来有点好笑。
2. When this energy is properly applied, the meditator stays constantly in a state of calm and alertness. 当合适的能量被应用，禅定者能够保持在一种持续的平静与警醒的状态。
3. She said music was more effective than silence, conversation or talk radio in achieving an optimal state of alertness. 她说，就进入最理想的警觉状态而言，音乐比沉默、对谈或广播谈话节目更有效。
英英解释
n.
1. the process of paying close and continuous attention
2. a state of readiness to respond
3. lively attentiveness
