在实际中，此函数可用于以下情况：公司希望知道其业务中心(点轮廓)5000米(或任何其他数字)范围内的服务覆盖情况。
In practice, this function can be used in such case in which a company may want to know the service coverage within 5000 (or any other number) meters of its business centers (point features).
今天我们的业务范围覆盖100多家公司，涉及12大行业。
Today, our business scope covers more than 100 companies, involving 12 major industries.
Patch的运营范围覆盖美国的850个城市。如果关闭这块业务，美国在线转眼就能赢利。
Closing Patch, which operates in 850 towns around the country, would make AOL instantly profitable.
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