单词	allopreen
释义	allopreen verb, transitive + intransitive al·​lo·​preen ˈa-lə-ˌprēn  allopreens; allopreened; allopreening of a bird : to preen or groom the skin or feathers of another bird On other occasions in succeeding weeks the female allopreened her mate, who sometimes solicited by putting his head down. Lawrence Kilham, The American Crow and the Common Raven, 1991 Allopreening in birds is usually directed at the top of the head, a part of the body not easily reached by the recipient. James F. Wittenberger, Animal Social Behavior, 1981 Word History Etymology allo- + preen entry 3 First Known Use 1965, in the meaning defined above
随便看	turning points turning rest turning round turning saw turning sickness turning spur turning square turning tail turning to turning turtle turning up turnings turnip turnip aphid turnip bean turnip beetle turnip cabbage turnip celery turnip flea turnip flea beetle turnip fly turnip foot turnip ghost turnip grass turnip greens

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