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单词 concussion
释义 concussion
[kǝn`kǝsh·ǝn]
ENGINEERING
Shock waves in the air caused by an explosion underground or at the surface or by a heavy blow directly to the ground surface during excavation, quarrying, or blasting operations.
MEDICINE
A state of shock following traumatic injury, especially cerebral trauma, in which there is temporary functional impairment without physical evidence of damage to impaired tissues.
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