"Interface", in computer terminology, originally means the conversation between the human and the intelligentce machine.

界面 ，来自计算机术语 ，指人机交流的接触面。

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Northeastern University researchers made Nexi the key ingredient of an experiment where subjects were asked to play a Prisoner's Dilemma-style game immediately after a conversation, whether it was with a human or a machine.

ENGADGET: Nexi robot helps Northeastern University track effects of shifty body language (video)