名词
中文翻译：四弦线
同义词：
['four-stringed instrument', 'four-stringed musical instrument例句：1. The violins on the stage are made of a tetrachord.（舞台上的小提琴是由四弦琴制成的。）']
例句：
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1. The violins on the stage are made of a tetrachord.
舞台上的小提琴是由四弦琴制成的。
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2.She learned to play the tetrachord when she was young.
她小时候就学会了弹四弦琴。
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3.The tetrachord is an important part of classical music.
四弦琴是古典音乐的重要组成部分。