不起作用的原因就是事实上出版商提供了相当有用的服务：他们编辑书，然后宣传它。
The reason it doesn't work is that the publishers do actually perform quite a useful service: they edit the book, then they publicise it.
不起作用的原因就是事实上出版商提供了相当有用的服务：他们编辑书，然后宣传它。
The reason it doesn't work is that the publishers do actually perform quite a useful service: they edit the book, then they publicise it.
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