| 单词 | Hirundo pyrrhonota |
| 释义 | Hirundo pyrrhonota (extremely rare) n WORD FAMILY Hirundo pyrrhonota n North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls Syn|Hyper cliff swallow swallow small long-winged songbird noted for swift graceful flight and the regularity of its migrations |
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