Electrodes send electrical signals along the median nerve in each wrist, up the spinal cord and to the thalamus, the main relay station in the brain.

电极通过每个手腕中神经发送电信号，沿脊髓而上到达丘脑——大脑中的主要中转站。

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In some cases, it can use one mobile device to relay power to another, keeping everything fed even if the main power hub is tied up.

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In another scheme to resurface the main route for vehicles in the square, sub-contractors are having to relay the road surface after problems were identified.

BBC: Caernarfon Castle Square parking ban for many motorists

On February 28th and March 1st, American missiles blew up radio relay stations near Mosul in the north that transmit operational data for Iraq's main oil pipeline.

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