小提琴的弦走调了。
The violin's ___string was out of tune.
那位吉他手,刚刚弄断了吉他的一根弦,开始喝一些酒。
The guitarist, who had just broken one ___string of his guitar, began to drink some alcohol.
你应该定期更换乐器上的弦。
You should change the ___string on your instrument regularly.