一、英譯中:請將以下英文翻譯成正確流暢的中文。(25 分)
Within political systems, political public relations—as a form of supportive communication—fulfils an important legitimizing function : governments, ministries and official bodies all need to communicate their policy output to the citizens if they want to gather collective support for their actions. This is notably the case for the EU, which has experienced several crises of confidence in recent years. Its special institutional setting and multilevel reality, however, present special challenges for political communication specialists involved in this process.