基本解释n. (鼓的)咚咚聲； 旅館同根派生 rub-a-dub相关词英汉例句用作名詞 (n.)A series of short,sharp sounds,as that made by knocking on a door.咚咚聲一連串短而尖的聲音，例如敲門聲。rub-a-dub更多例句