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单词 feather
释义 feather
[`feth·ǝr]
MECHANICAL ENGINEERING
To change the pitch on a propeller in order to reduce drag and prevent windmilling in case of engine failure.
METEOROLOGY
See <<barb>>
VERTEBRATE ZOOLOGY
An ectodermal derivative which is a specialized keratinous outgrowth of the epidermis of birds; functions in flight and in providing insulation and protection.
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