调解人

chōng dāng shuāng fāng de tiáo jiě rén

充当双方的调解人

act as an intermediary between the two parties

wǒ men chǎo jià shí tā chōng dāng tiáo jiě rén

我们吵架时，她充当调解人。

She acts as a mediator when we have a quarrel.