当所有这些因素放在一起，并且由经济学家计算得出这些数字时，它最终的净值是正数，但只是一个很小的数。
When all those factors are put together and the economists calculate the numbers, it ends up being a net positive, but a small one.
至于这个公式里的其他元素，b和T1直接相关，它由袭击次数n的对数和袭击间隔Tn的关系计算得出。
The other element of the equation, b, turns out to be directly related to T1. It is calculated from the relationship between the logarithms of the attack number, n, and the attack interval, Tn.
“数量”由电脑根据净重除以单重计算得出，同时可以手工修改。
"Quantity" obtains by the computer according to the net weight dividing single computation, simultaneously may revise manually.
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