key to seniority

• 论资排辈

key to seniority的用法和样例：

例句

1. Pay and promotion are often by seniority.
   教师的薪金和晋升也是论资排辈。
2. The seniority system represents a force of habit and is backward.
   论资排辈是一种习惯势力，是一种落后的习惯势力。