1
have seniority over sb
seniority 在此作不可数名词，表示‘更长的服务时间带来的更高地位’。介词 over 后接比较对象。
Because she started earlier, she has seniority over the new recruits.
因为她入职更早，所以她的资历比新员工深。
资历；年资；老资格
先理解核心含义，再看它在真实句子里的用法。
资历；年资；老资格
higher rank than that of others especially by reason of longer service
Because she started earlier, she has seniority over the new recruits.
因为她入职更早，所以她的资历比新员工深。
资历；按成员服务时间长短衡量并授予资历较长者特权的标准
A measure of the amount of time a person has been a member of an organization, as compared to other members, and with an eye towards awarding privileges to those who have been members longer.
因服务时间长而获得的更高职位
higher rank than that of others especially by reason of longer service
长寿的特性
the property of being long-lived
He got the promotion because of his seniority in the company.
他因为在这家公司的资历而得到了晋升。
In many workplaces, employees are paid according to seniority.
在许多工作场所，员工的薪资按资历计算。
She has enough seniority to lead the team.
她有足够的资历领导这个团队。
seniority 在此作不可数名词，表示‘更长的服务时间带来的更高地位’。介词 over 后接比较对象。
Because she started earlier, she has seniority over the new recruits.
因为她入职更早，所以她的资历比新员工深。
be based on 是常用被动结构，表示‘以…为依据’。若要对比其他标准，可用 rather than 带出。
In many companies, promotion is based on seniority rather than merit.
在许多公司，晋升的依据是资历而非才能。
X 用数字或表达时间长度的词代替，如 many, several, twenty。表示‘拥有多少年的资历’。seniority 前不加不定冠词，因为它通常不可数。
He has fifteen years of seniority at this hospital.
他在这家医院有十五年的资历。
Not this
He has many seniorities in the company.
Use this
He has a lot of seniority in the company.
seniority 是不可数名词，不能用 many 或复数形式来表示“很多资历”；表示程度时应用 a lot of 或 much。
Not this
He got promoted because of his senior.
Use this
He got promoted because of his seniority.
because of 后需接名词，senior 是形容词或指“上司/年长者”的名词，而“资历”这个抽象概念应使用名词 seniority。
Not this
He has seniority than his colleague.
Use this
He has more seniority than his colleague.
比较结构要用 more + 不可数名词 + than，不能省略 more，否则句子缺少比较级标记。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
按资历
Promotions at this company are decided by seniority.
这家公司的晋升是按资历决定的。
资历制度
The union defended the seniority system for layoffs.
工会维护裁员时按资历排队的制度。
资历级别
Employees at a higher seniority level get more vacation time.
资历级别较高的员工有更多假期。
服务年限
Pay raises depend on length of seniority.
加薪取决于服务年限。
年资权利
Seniority rights protect older workers during downsizing.
年资权利在裁员时保护老员工。
按资历顺序
Office assignments are made in order of seniority.
办公室分配按资历顺序进行。
凭借资历
She got the promotion by virtue of seniority.
她凭借资历获得晋升。
资历有它的特权
The senior staff chose their holidays first—seniority has its privileges.
资深员工先选假期——资历有它的特权。
Use seniority naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 senior（年长的、资深的）+ ity 名词后缀：老员工靠年资排在前，seniority 就是“资历老”。
语域：neutral 常见场景：职场、公司制度、工会、法律/合同 该词多用于职场或组织机构中，指因工作年限较长而享有的较高地位或优先权，语气较正式；日常口语中较少使用，通常出现在书面或正式场合。
这些词都以 -iority/-ority 结尾。priority、majority、minority、authority 的重读元音都是 /ɔːr/，后接 /əti/，彼此押韵；superiority 和 inferiority 在重读前多一个音节，但结尾的 /ˈɔːrəti/ 也相同。seniority 根据给定音标是 /siˈnjɔrɪti/，重读后的元音是 /ɪ/，与上面这些词（多为 /ə/）并非完全押韵，只适合作为拼写对照。
Dictionary facts from ECDICT, WIKTIONARY.