它发回了简单信号。

It sent back simple signals.

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这一规划只需每次打开电脑或手机时使用一个简单信号- - -使用一种诸如数码标示、一张智能卡或指纹扫描器这类的装置。

The plan calls for a single sign-in each time a computer or phone is turned on, using a device such as a digital token, a smartcard, or a fingerprint reader.

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同样，孩子们也倾向于把机器人当成同类，即使它们只是表现出简单的社交信号。

Similarly, children tend to treat robots as if they are fellow beings, even when they display only simple social signals.

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