词汇 | medullary sheath |
释义 | Definition of medullary sheath in English:medullary sheathnoun
OriginEarly 19th century; earliest use found in Patrick Keith (1769–1840). Definition of medullary sheath in US English:medullary sheathnoun
OriginEarly 19th century; earliest use found in Patrick Keith (1769–1840). |
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