second string
noun
1
- （常用于短语a second string to one's bow）an alternative resource or course of action in case another one fails替补资源; 替补方案：
he was principally a batsman and bowling was the second string to his bow.
他主要是击球手, 担任投球手只是作为替补。
2
- (in sport) the second-choice players（体育用语）备选队员, 二线队员：
Mimms will play in goal for City's second string.
米姆斯将作为城市队的备选守门员参赛。