因其具有的显著性、反常性和更易被二次传播的特性，成为媒体在市场竞争中的“王牌”之一。
Because of its significance, abnormalism and characteristic of second spreading, it has become one of the "trumps" in media competition.
这导致“黑盒”使用模式，一个服务在不知道客户端知识的情况下利用其他服务，因而传播带有二次影响的变更。
This leads to a "black-box" usage model, where a service may utilize other services without the client's knowledge, thereby propagating changes with secondary effects.
另一方面又利用矩阵理论等推导出含有二次项的非线性函数的协方差传播公式的矩阵形式。
On the other hand, it also derives the covariance propagation formula of non-linear function containing quadratic term in matrix form using the matrix theory etc.
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