act as a surrogate
collocation充当替代者；担任代理人
She acted as a surrogate for the manager while he was on leave.
经理休假期间，她担任他的代理人。
代替者；替代者
先理解核心含义，再看它在真实句子里的用法。
代替者；替代者
A person who takes the place of another, especially in a role such as a parent.
She is a surrogate for the project leader while he is away.
项目负责人不在时，她就是他的代理人。
替代品(通常指人、职位或角色)
A substitute (usually of a person, position or role).
替代他人的人
someone who takes the place of another person
替代他人社会或牧师角色的人或动物,如代理父母
A person or animal that acts as a substitute for the social or pastoral role of another, such as a surrogate parent.
被指定代表他人行事的人
a person appointed to represent or act on behalf of others
The volunteer acted as a surrogate for the host at the reception.
这位志愿者代替主人接待来宾。
Parents often use grandparents as surrogates when they cannot attend school events.
父母无法参加学校活动时，常让祖父母代为出席。
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充当替代者；担任代理人
She acted as a surrogate for the manager while he was on leave.
经理休假期间，她担任他的代理人。
代孕母亲；替代母亲
The couple hired a surrogate mother to carry their child.
这对夫妇雇用了一位代孕母亲来孕育他们的孩子。
指定代理人；委任代表
You should appoint a surrogate to make medical decisions if you become unable to do so.
如果你变得无法自己做决定，应当指定一名代理人来做出医疗决定。
……的替代者；作为……的替代
The exercise is not a surrogate for proper medical treatment.
这种锻炼不能替代正规医疗。
替代决策者；代为做决定的人
A close relative may be asked to act as a surrogate decision-maker.
近亲可能会被要求担任替代决策者。
替代父母；代理家长
The school acted as a surrogate parent for the orphaned boy.
这所学校充当了这个孤儿的代理家长。
你不是你。你是你的替身。
The chairman was too ill to attend, so he sent a surrogate to vote on his behalf.
主席病得不能出席，所以派了一名代表替他投票。
Use surrogate naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住 surrogate 结尾像 gate（门）：代理人就像替你站在门口应付外人的人。
语域：formal 常见场景：法律或医学文书、学术讨论 作为名词表示“替代者/代理人”时，通常用于正式或书面语境，比较常见于法律、医学或学术讨论；日常口语中更常说 substitute 或 replacement。
No common words rhyme with surrogate (/ˈsɝəɡət/). The -rogate verbs listed above (abrogate, arrogate, derogate, interrogate) are spelling lookalikes pronounced with /geɪt/, so they do not rhyme. Aggregate and delegate (noun) share the final /gət/ sound but have different stressed vowels, so they are not true rhymes either; they help illustrate the noun/adjective -ate reduction to /ət/.
Dictionary facts from ECDICT, WIKTIONARY.