第一弦 meaning in English

first string

He asserted that the most common shortcoming of most classical guitars were weak trebles , especially the g string , and the characteristic reticence of the notes played on the tenth , eleventh and twelfth frets of the first string
他坚称在古典吉他上最常见的缺点是高音较弱，特别是在g弦，和弹第一弦十、十一和十二琴格上的音时，常出现典型的沉默寡言（译者按共鸣较弱）。