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[Subject: Music]
- 乐器上用以发声的钢丝、铜丝、尼龙丝或丝线
Translated by: GIANFRANCO MANTOVANI
Translated in 32 languages
[Subject: Geometry]
- 一直线与圆相交与两点,在源周内的部分叫弦
Translated in 15 languages
Translated in 2 languages