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。
Including: money, length, time, weight, perimeter, area, volume and speed.
包括货币、长度、时间、重量、周界、面积、体积和速度。
The distribution of area, perimeter and number character of patch types is unequal;
各斑块类型拥有的面积、周长、斑块数等特征分布不均衡；
The distribution of area, perimeter and number character of patch types is unequal;
各斑块类型拥有的面积、周长、斑块数等特征分布不均衡；
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