Kennedy had the patience for the slow grind of legislation and he knew how to cope with a seniority system.
肯尼迪对缓慢的立法工作有耐心，他知道如何应对资历制度。
英语百科
Seniority
（重定向自Seniority System）
Seniority is the concept of a person or group of people taking precedence over another person or group because the former is either older than the latter or has occupied a particular position longer than the latter. Seniority is present between parents and children and may be present in other common relationships, such as among siblings of different ages or between workers and their managers.