一些志愿者要去打扫中央公园。

Some volunteers are going to clean up the central park.

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我在黄石国家公园做了一年多的狼踪迹志愿者。我的工作是追踪合记录狼的信息。

I've been working as a volunteer wolf tracker in Yellowstone National Park for over a year. It's my job to follow wolves to record information about them.

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密西根大学曾做过一次研究，其中一组志愿者的任务是漫步公园，另一组则是行走城市街道。

In a particular study by the University of Michigan, one group of volunteers took a walk in the park, while another group navigated the busy city streets.

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