surrogate|surrogates

这对夫妇选择了一位代孕母亲来帮助他们拥有孩子。

The couple chose a ___surrogate to help them have a baby.

在这项研究中，动画角色被用作人类情感的替代符号。

In this study, cartoon characters were used as ___surrogates for human emotions.

由于经理生病了，他的助理担任了临时替代者出席会议。

The manager's assistant acted as his ___surrogate at the meeting when he fell ill.