乐曲 yuèqǔ musical composition
How to remember 乐曲: 乐 cheerful + 曲 bend = musical composition.
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How it is used
- A piece of (usually instrumental) music, a composition - 一首乐曲 (yì shǒu yuèqǔ) a musical piece; 优美的乐曲 (yōuměi de yuèqǔ) a beautiful tune.
- 乐 is read yuè ('music'); measure word 首 (shǒu).
- 乐曲 emphasizes the composed melody/piece; 歌曲 (gēqǔ) is specifically a song with lyrics.