Germs can live on surfaces for hours.
Meaning: This means that even if you don't see any dirt or germs on a surface, they could still be there and make you sick.
Choice of Words: Germs are tiny living things that can cause illness. Can is a modal verb used to express ability, permission, or possibility. Live means to be alive or to exist. On means in or at a particular place or position. Surfaces are the outer parts or top layers of something. Hours are periods of time equal to sixty minutes.
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