He acted as an intermediary between Copeland and the villagers.

他充当了Copeland和村民之间的调解人。

He acted as a neutral between the parties.

他在两党间充当了中立者的角色。

They acted as lookouts at the post office.

他们负责守望邮局。

Their primitive valuables acted as a medium of exchange.

他们的原始贵重物充当交换媒介。

The prime minister's speech acted as a catalyst for debate.

首相的演讲对辩论起到促进作用。

The military acted as arbiter of conflicts between political groups.

军方担任了不同政治团体之间纷争的仲裁人。

They acted as an intellectual leaven to the warriors who dominated the city.

他们对主宰城市的武士们在智力方面起到了潜移默化的影响。

She assumed the role of/acted as interpreter for the guests.

她充当来宾的翻译。

I acted as go-between for them to meet and fall in love.

他俩谈恋爱是我牵的线。

This shop is a cover for unlawful activities. / This shop acted as concealment for illegal activities.

这家商店为非法活动打掩护。