单语范例（未经PONS编辑处理）
In some cases, these proxy servers are transparent proxies, and the user may be unaware that they are using them.
en.wikipedia.org Each proxy server strips off its own layer of encryption to reveal where to send the message next.
en.wikipedia.org Then, he used to act as a proxy actor when actors of small roles could not arrive in time at the set.
en.wikipedia.org They may believe that by using these proxies, they are hedging their bets or redressing what they feel is an imbalance in regional power.
en.wikipedia.org Proxies can be combined to produce temperature reconstructions longer than the instrumental temperature record and can inform discussions of global warming.
en.wikipedia.org