Robots capable of social engagement help with loneliness as well as cognitive functioning, but the robot itself doesn't have to engage directly—it can serve as an intermediary for human communication.

能够参与社交的机器人可以帮助缓解孤独感并发挥认知功能，但机器人本身并不需要直接参与，它可以作为人类交流的中介。

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The toy can serve as "a communication tool" for the young and old, she said。

她说，该玩具可谓老少咸宜的“沟通工具”。

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The language communication principles set up while concerning of both sides that politeness principle is speaking, serve for language communication finally.

礼貌原则是在说话双方互动关系中建立起来的语言交际原则，最终是为语言交际服务的。

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"In the near future, this type of simple laser communication might serve as a backup for the radio communication that satellites use, " Smith said in a statement.

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