As for the retracting of the published works, because of so many temporary reproductions exist in many servers, personal computers, how can the author retract his work if he wants to do so?

• 至于收回已公开的作品，由于可能会有很多的副本存放于一些服务器或个人计算机里，如果作者想要如此收回自己的作品，他该怎么做呢？