noun 下载 🔗分享 燕子， 崖燕。 Any of various passerine birds of the family Hirundinidae, which also includes swallows, that catch insects whilst flying. Examples : "During the summer, the martins built their mud nests under the eaves of our house and spent their days catching insects in flight. " 夏天的时候，燕子在我们家的屋檐下用泥筑巢，整天忙着在空中捕食昆虫。 animal bird nature organism biology ecology 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 磨石，碾磨器。 A perforated stone-faced runner for grinding. Examples : "The ancient olive oil press used martins to slowly crush the olives, extracting their precious oil. " 古老的橄榄油压榨机使用磨石来缓慢压碎橄榄，提取它们珍贵的油。 machine utensil agriculture 与AI对话词汇游戏阅读练习
