| natural |
the radiation that has always been present in the environment and is produced by natural sources such as cosmic rays and radioactive elements in the ground, building materials and the human body.
출처: www.sce.com/SC3/PowerandEnvironment/PowerGeneratio...
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|---|---|
| natural |
A part of the natural surface of a rough diamond left on the girdle of a polished stone. This is often the sign of a good cutter aiming for maximum weight retention.
출처: www.buyadiamond.net/page/gloss.shtml
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| natural childbirth |
General term for labor and delivery free of medical intervention.
출처: parentcenter.babycenter.com/glossary/N
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| natural selection |
the process in nature by which, according to Darwin's theory of evolution, only the organisms best adapted to their environment tend to survive and transmit their genetic characters in increasing numbers to succeeding generations while those less adapted tend to be eliminated (also see evolution)
출처: www.internal.schools.net.au/edu/lesson_ideas/dinos...
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| natural selection |
Nature's builtin process of determining which individuals in a population survive and reproduce; contrasted with aesthetic selection, wherein an evolutionary artist guides such selection.
출처: www.dakotacom.net/~srooke/glossary.html
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