noun🔗Share燕，崖燕，家燕。 Any of various passerine birds of the family Hirundinidae, which also includes swallows, that catch insects whilst flying.""A martin flew quickly overhead, snapping up a mosquito in mid-air." "一只燕子快速地从头顶飞过，在空中一口吞掉了一只蚊子。animalbirdnaturebiologyorganismChat with AIVocabulary GamePractice Reading
noun🔗Share磨石，研磨器。 A perforated stone-faced runner for grinding."The miller carefully adjusted the martin in the mill to ensure a consistent grind of the wheat. "磨坊主小心地调整了磨坊里的磨石，以确保小麦研磨的粗细均匀。machineutensilarchitectureChat with AIVocabulary GamePractice Reading
