| 单词 | cliff swallow |
| 释义 | cliff swallow cliff swallow n.（名词）A North American swallow(Petrochelidon pyrrhonota) that builds a bottle-shaped nest of mud, grass, and twigs on the face of a cliff or bluff or under the eaves of a roof. 红石燕，崖燕：一种北美燕子（红石燕 鸲燕属） ，用泥、草及细枝在峭壁、陡崖表面或房屋屋檐下筑造瓶状巢穴 |
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