surrogate
adjective [ before noun ] uk/ˈsʌr.ə.ɡət/ us/ˈsɝː.ə.ɡət/
替代的;代理的
replacing someone else or used instead of something else
Because she had no children of her own, her friend's son became a kind of surrogate child to her. 因为她自己没有孩子，所以她就把朋友的儿子当成了自己的孩子。
surrogate
noun [ C ] uk/ˈsʌr.ə.ɡət/ us/ˈsɝː.ə.ɡət/
替代;代理
something that replaces or is used instead of something else
For some people, reading travel books is a surrogate for actual travel. 对某些人来说，读游记可以替代真正的旅行。
代理人，代班者，代言人
a person who acts or speaks in support of someone else, or does his or her job for a certain time
Both candidates in the election have turned to celebrity surrogates to excite the crowds. 参选的两位候选人都求助于名人代言人来激发观众的热情。
(also surrogate mother)代孕妈妈
a woman who has a baby for another person who is unable to become pregnant or have a baby
She has agreed to act as a surrogate mother for her sister. 她已经同意为她姐姐代孕了。