Many cellphones emit the most radiation when they initially establish contact with the cell tower making their "digital handshake."

许多手机在首次与基站建立联系，进行“数码握手”时会释放出最大的辐射。

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Many cellphones emit the most radiation when they initially establish contact with the cell tower, making their "digital handshake."

许多手机在与信号塔建立连接、接通信号的那一刻放出最大量的辐射。

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And, as you might recall from the digital certificates discussion in Part 2 of this series, the server must also provide the security certificate used during the handshake.

并且，正如我们可以从本系列的第2部分有关数字证书的讨论中看到的一样，服务器还必须要在握手过程中提供安全证书。

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Where once our reach was limited by physical boundaries, today almost everyone and everything is just a digital handshake away.

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The real advances will come at least a decade from now, when onboard computers will negotiate, from hundreds of kilometers away, the best way for two planes to avoid each other in a process similar to the digital handshake between two computers sharing data on a network.

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