名词是usual，表示习惯，例如：
1、They had delayed having children， for the usual reason， to establish their careers为了那个通常的原因——创立自己的事业，他们推迟了要孩子。
2、She had to spend nearly four months away from him that summer， instead of the usual two那个夏天她被迫离开他将近四个月而不是通常的两个月。
3、Several more people than usual came to the meeting.到会的人比平时多了几个。
