contaminate是什么意思？

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.

Rivers and lakes nearby will gradually become contaminated.

More than 80% of those cases can be attributed to contact with contaminated water and a lack of proper sanitation.

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.

By contacting contaminated body fluids

Iced coffees sold by some popular chains are contaminated.