If fishing, can await a fish silently already hurl oneself willingly into the net, also can hit out actively, search prey.

捕鱼的话，既可以静静的等待鱼自投罗网，也能够主动出击，寻找猎物。

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If from logic Lai is analysed, network advertisement does not have a law to sell anyhow, selling a network AD at that time is hurl oneself willingly into the net.

如果从逻辑上来分析，网络广告无论如何是没法卖的，那个时候卖网络广告就是自投罗网。

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