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Back it up and set up a perimeter.
把它堆起来,设立一个环形防线。
youdao
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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
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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