dna 人体
Phosphorus is the second most plentiful mineral in your body. There are 25 400 000 nanometers in one inch. On a comparative scale if the diameter of a marble was one nanometer then diameter of the earth would be about one meter.
Dna 人体. A strand of human dna is 2 5 nanometers in diameter. A human hair is approximately 80 000 100 000 nanometers wide.
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