s. occurring from time to time
a. 偶然的, 临时的
[法] 偶然的, 特殊场合的
1. I enjoy occasional visits to the museum on weekends.
我喜欢在周末偶尔去博物馆参观。
2. She receives occasional emails from her old friends.
她偶尔会收到老朋友发来的邮件。
3. We have occasional meetings to discuss our progress.
我们偶尔召开会议来讨论我们的进展。