To winnow down the strongest candidates, they tried exposing these bacteria to what should have been far more toxic substances, antibiotics.
为了减少所最强的候选人，他们试图揭露这些细菌究竟应该已经远远有毒物质，抗生素。
To winnow down the strongest candidates, they tried exposing these bacteria to what should have been far more toxic substances, antibiotics.
为了减少所最强的候选人，他们试图揭露这些细菌究竟应该已经远远有毒物质，抗生素。
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