An urban food myth contends that if food spends just a few seconds on the floor, dirt and germs won't have much of a chance to contaminate it.
2018年12月四級真題（第三套）閱讀 Section B
Rivers and lakes nearby will gradually become contaminated.
出自-2016年6月閱讀原文
More than 80% of those cases can be attributed to contact with contaminated water and a lack of proper sanitation.
出自-2016年6月閱讀原文
Both strains quickly invaded local hospitals when needle sharing and other unhealthy practices ensured the rapid spreading of the infection by bringing people into contact with contaminated body fluids.
出自-2013年6月聽力原文
By contacting contaminated body fluids
出自-2013年6月聽力原文
Iced coffees sold by some popular chains are contaminated.