| backscatter |
(back
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| back pain |
Back pain is one of humanity's most frequent complaints and does not usually reflect any underlying disease. However, anyone with back pain that does not improve after a few days should first consult a Physician, as back pain can sometimes indicate significant and serious conditions which might not otherwise be diagnosed. Back pain is very rarely a sign of a serious medical problem. It is however important that the treatable medical causes are identified early on. ...
출처: en.wikipedia.org/wiki/Back_pain
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| backache |
Back pain is one of humanity's most frequent complaints and does not usually reflect any underlying disease. However, anyone with back pain that does not improve after a few days should first consult a Physician, as back pain can sometimes indicate significant and serious conditions which might not otherwise be diagnosed. Back pain is very rarely a sign of a serious medical problem. It is however important that the treatable medical causes are identified early on. ...
출처: en.wikipedia.org/wiki/Backache
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| background radiation |
Background radiation is the ionizing radiation from several natural radiation sources: sources in the Earth and from those sources that are incorporated in our food and water, which are incorporated in our body, and in building materials and other products that incorporate those radioactive sources; radiation sources from space (in the form of cosmic rays); and sources in the atmosphere which primarily come from both the radon gas that is exhaled from the earth's surface and subsequently ...
출처: en.wikipedia.org/wiki/Background_radiation
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| back |
A bird's back begins at the nape and ends at the rump. Ordinarily it is similar in color to the wings and head, although there are (as always) exceptions, such as the Downy Woodpecker with its outstanding white back. Within the back, much of the vertebra are fused together and many muscles are reduced or absent, which means that birds must rely on the neck for most upper-body flexibility. ...
출처: www.geocities.com/easternbirds/Glossary.html
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