Definition: the most helful assistant or employee
Examples:
1. Sam’s right-hand man helps him make all of his decisions.
2. When Sam retired, his right-hand man took over.
中文解释:http://www.youzienglish.com/index.php/cn/idiom_of_the_day/
1. Sam’s right-hand man helps him make all of his decisions.
2. When Sam retired, his right-hand man took over.