In recent months, there have been sporadic government sponsored events at sports complexes throughout Moscow, encouraging people to exercise instead of drink.

VOA: standard.2009.10.15

These are--human attention tends to be sporadic.

人类无法持续保持注意力

耶鲁公开课 - 金融市场课程节选

Since Thursday night, there have been sporadic street battles around the red-shirt camp in the middle of an upscale commercial,hotel and residential district in Bangkok.

VOA: standard.2010.05.14

But sporadic gunfire means people are being harassed.

VOA: standard.2010.06.15