主机对总线有最高的控制权，在任何时候通过将时钟线拉低就可以禁止通信。

The host has ultimate control over the bus and may inhibit communication at any time by pulling the Clock line low.

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考虑权力制衡对公司价值的影响，发现当控股股东的控制力和其现金流量权分离越大时，公司价值越低。股权制衡和控制权竞争程度越高时，公司价值越高。

Consider the effect of the balance power of shareholder, it shows the higher degree of the separation, the lower the company value it gets.

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