First of all, offer the source of income for baidu still only search advertising.

首先，能为百度提供收入来源的依然只有搜索广告。

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Advertising represents a particularly important product information source.

广告是一种产品信息来源。

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Therefore, the channel quickly became an important source of advertising revenue.

因此，迅速成为频道广告收入的一个重要来源。

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Therefore, the channel quickly became an important source of advertising revenue.

因此，迅速成为频道广告收入的一个重要来源。

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