Back it up and set up a perimeter.

把它堆起来，设立一个环形防线。

youdao

The team set up a perimeter and began sweeping the area clean.

研究小组在此地圈定了一个周长，开始着手清理这块区域。

youdao

Mr. Davis said police set up a perimeter around that boat when they arrived.

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When backup arrived, the suspect had disappeared, prompting officers to set up a perimeter, Santa Cruz County Sheriff Phil Wowak said.

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They set up a perimeter around the demonstration, they blocked view of the demonstration with a parked bus and they also physically prevented people from joining.

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