To avoid any division by zero or overflow, transform all division into multiplication and check for the sign (horizontal lines with Y2=Y1 do not count in the algorithm)

要避免任何数与 0 相除或溢出，将所有除法转换为乘法并检查运算符号（Y2=Y1 的水平线不会计入算法）

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Buy/read tabloid magazines (browsing them in the check-out aisle or an airport doesn’t count)

——购买/阅读八卦杂志 （在一些诸如退房等待或者机场等公共区域看一眼不算）

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Each check may be described in a separate flow, and hence may count as at least one transaction.

每一个检查可能会在单独的流程中得到描述，因此被计算成可能不止一个事务。

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An eye in the sky could be used to interdict drugs, size up needs in disaster relief, ensure port security, check power lines and fuel pipelines, fight forest fires and count wildlife, Brown said.

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