adj.零星的，偶尔发生的，间或出现的，阵发性的，断断续续的

The weather is sporadic, one moment it's sunny, the next it's pouring rain.
天气多变，一会儿晴朗，一会儿下大雨。
His moods are sporadic; one day he's full of energy, the next he's completely withdrawn.
他的情绪起伏不定，有时充满活力，有时又非常内向。
The team's performance has been sporadic this season, winning only a few games.
这个赛季球队的表现时好时坏，只赢了几场比赛。
Sporadic applause broke out during the dull lecture.
在沉闷的演讲中，偶尔会响起掌声。
The internet connection is sporadic, making it difficult to stream videos.
网络连接不稳定，看视频很困难。
Her visits to the gym are sporadic, she tends to be inconsistent with her exercise routine.
她去健身房的频率很低，运动计划并不稳定。
The flowers bloomed sporadically throughout the year in this tropical climate.
在这种热带气候中，花朵一年四季零星开放。
The company's sales have been sporadic due to the unpredictable market conditions.
公司的销售受市场状况影响，起伏不定。
Sporadic UFO sightings continue to intrigue and fascinate people around the world.
零星的不明飞行物目击事件在全球范围内持续引发人们的兴趣和好奇。
His knowledge of history is sporadic, he seems to remember bits and pieces here and there.
他对历史知识的记忆断断续续，记得的片段零散不全。