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单词 obstruction
释义 obstruction
[ǝb`strǝk·shǝn]
MEDICINE
Occlusion or stenosis of hollow viscera, ducts, and vessels.
NAVIGATION
Anything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel or aircraft; usually refers to an isolated danger to navigation, such as a submerged rock or pinnacle in the case of marine navigation, and a tower, tall building, mountain peak, and so forth, in the case of air navigation.
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