道德，品行，士气一个人或集体具有的精神状态，通过信心、愉快、纪律和乐于执行所分配的任务来展现 The state of the spirits of a person or group as exhibited by confidence, cheerfulness, discipline, and willingness to perform assigned tasks.
一到周末纪律往往松弛下来。 Discipline is often relaxed at weekends.
那位老师无法维持教室纪律。 The teacher can't keep discipline in her class.