For each character in the first string, any letter that appears in the second string is replaced by the corresponding letter from the third-string.
对于第一个字符串中的每个字符，第二个字符串中的任意一个字符都由第三个字符串中相应的字母所替代。
2
Chelsea are set to go into their crunch Champions League showdown against Barcelona with third-string goalkeeper Hilario between the posts.
在接下来的一场欧冠焦点恶战中，切尔西或许会启用他们的第三号门将希拉里奥来封死对手巴萨。
3
This process converted me from a third-string player on a second-rate college tennis team to someone who could win a few minor tournaments on the pro circuit.