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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