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Uncontaminated
"Uncontaminated" in a Sentence (2 examples)
But rather than collecting these grains from the ground and saving the mission cost of $168 million, Donald Brownlee says it was necessary to go to the comet to get them, because they are uncontaminated by earthly material.
These people, it may be noted, belong to a primitive race, uncontaminated by contact with white races, and practically still in the Stone Age.
See also for "uncontaminated"
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