Describes text, a song, or a slogan that is easy to read aloud, memorize, and pleasant to the ear due to its clear rhythm and smooth flow; catchy.
这首歌的旋律优美，歌词朗朗上口，很快就在大家之间传唱开来。
The melody of this song is beautiful, and its lyrics are catchy and easy to sing, so it quickly spread among everyone.
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