What's more, when people are in danger and there is no mobile phone signal, they can use Beidou to send a 1200-word message to ask for help.

更重要的是，当人们处于危险之中而手机又没有信号时，他们可以使用北斗发送一条1200字的信息寻求帮助。

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They turned it on, and replayed the previously recorded signal from CA1 — like a recorded message from the brain. The rats remembered.

当他们打开了它，并重新播放先前在CA1上记录到的信号，即从脑中记录的信息，这些大鼠记住了。

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Signals are different in that they cannot return anything: there is neither a "signal return" message, nor any other type of error message.

信号的不同之处在于它们不返回任何内容：既没有“信号返回”消息，也没有任何类型的错误消息。

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Just like the dutch coffeehouses, and countless wall street bars, and stock message boards, Twitter is going to have either a low signal to noise ratio if you are being polite, and a lot of BS if you are not.

FORBES: So Much For Mining Twitter Sentiment For Picking Stocks

Should a majority of the latter give Ariel Sharon a mandate, it will be a powerful signal of strength and resolve provided he does not immediately adulterate that message by seeking a national unity government that would assign key portfolios (such as defense and foreign affairs) to failed Labor party figures like Barak and Shimon Peres.

CENTERFORSECURITYPOLICY: New Wind Blowing in the Middle East

Because of a bad signal, the Pope's first call didn't come through, so the pontiff left a message.

CNN: The 'cold call' Pope rings again