工龄的英文：
length of service
seniority
He is junior to me in respect of service.
他的工龄比我短。
Promotion is on the basis of seniority. But it is important to remember that merit also plays a part.
我们是根据工龄提升的。但是不容忽视的是，才干在这里也起着作用。
n. 长度；时间的长短；篇幅，放映时间；（某物的）一段；音长
The length of the chain molecule is proportional to the kinetic chain length
链分子的长度与动力学链长成正比。
The length of that pen is only a finger.
那支钢笔只有一指长。
The standard length in France is the meter.
法国的标准长度是米。
n. 公共服务系统；公共事业机构；政府机构；帮助，效劳
v. 检修，维修；为…提供服务
overhand service
高手发球
take service with
在￥帮佣
express goods service
特快货运业务
n. 资历，地位，级别
He is senior to me.
他的职位比我高。
The interests of seniors tend to be . . . varied
老年人的兴趣倾向于…多彩的。
Senior prom, do you have the fever?
毕业生舞会，你有兴趣吗？