The mutations appear to occur sporadically and spontaneously.
变异似是偶发和自发的。
As for other aspects, we will sporadically hand out questionnaires.
在其他方面，我们会偶尔发送调查问卷。
He attends school sporadically.
他上学时断时续。
Calendar spam is not in fact new, but has surfaced sporadically in recent years.
事实上，垃圾日历并不是什么新鲜事物，近几年零星有出现。
Date and location captions are scattered sporadically throughout the film.
日期和地点的字幕被随意地散布在整部电影中。
The encampment got into quiet in the sounds of snowslide sporadically.
营地在周围时不时的雪崩声中陷入了沉寂。
He only works sporadically.
他只是偶尔工作。
The volcanoes have been erupting sporadically over the last ten years.
过去十年来，这些火山不时地爆发。
Liver injury due to occupational exposure through inhalation and skin contact have been sporadically reported.
但经由呼吸道，皮肤及消化道的过度摄取常会导致肝伤害。
The militants have been sporadically fighting the government for years.
几年来，反叛分子一直对政府实施零星的战斗。
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