| parts per million |
This is a way of expressing very dilute concentrations of substances. Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Therefore 500,000 ppm is the same as 50 per cent, because 500,000 is half of a million. The concentration of oxygen in unpolluted fresh water is about 8 ppm ?only 8 parts of oxygen for every 1 million parts of other substances.
출처: www.science.org.au/nova/034/034glo.htm
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| partition |
A partition is a portion of a physical disk that functions as it were a physically separate unit.
출처: www.wrightcolorgraphics.com/p.htm
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| parthenogenesis |
Reproduction without male fertilization.
출처: www.fs.fed.us/r8/foresthealth/idotis/glossary.html
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| particle |
Any of the basic units of matter (eg, molecule, atom, proton, or electron).
출처: www.nmlites.org/standards/science/glossary_4.htm
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| parturition |
The act of bringing forth young; childbirth.
출처: www.goatworld.com/articles/terminology.shtml
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