second string

基本解释

Being CIO may never be the most obvious path to a corporation's top job. But no longer will the IT chief be relegated to the second string of folks in charge.
担任首席信息官也许从来不是成为通向企业最高管理层的最佳途径，但是，过不了多久，IT总监将进入高管第二梯队。
For each character in the first string, any letter that appears in the second string ('abcde...') is replaced by the corresponding letter from the third string ('ABCDE...').
中的任意一个字符都由第三个字符串（ 'ABCDE...' ）中相应的字母所替代。
City take this one handsomely with the aforementioned 22-man squad of quality and experience throughout. Their second string could conceivably challenge for a European placing in their own right.
这项评比中，曼城以其兼具实力与经验的22人豪华阵容笑纳了榜首，哪怕是他们的第二阵容都已经足以谋取一个欧战资格了。

The second thing is, just as in the case of the violin string, the wave equation, as posed by Schrodinger, has a plurality of solutions.
第二，就那个小提琴弦而言，波动方程，被薛定谔所提出的，有许多解法。
麻省理工公开课 - 固态化学导论课程节选
But really, the computer's just so fast I'm drawing the same string with just a slightly different number again and again after going to sleep one second at a time.
但是真实地，这个计算机到现在为止,我一次又一次用稍微不同的数字,绘画了相同的字符串,在睡眠1秒钟之后。
哈佛公开课 - 计算机科学课程节选
So this is again another method, this is remove, takes two arguments ivys the first is ivys, Harvard the second is the string Harvard.
这儿我们又用到了另外一种方法，就是remove，它有两个参数,第一个是，第二个是字符串。
麻省理工公开课 - 计算机科学及编程导论课程节选

If you describe a person or thing as someone's second string, you mean that they are only used if another person or thing is not available.