sp.an.
英
美
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(=spinal anesthesia) 脊髓麻醉
名词 span:
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the complete duration of something
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the distance or interval between two points
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two items of the same kind
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a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
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a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
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the act of sitting or standing astride
动词 span:
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to cover or extend over an area or time period, "The parking lot spans 3 acres"