第41部分 (第2/7頁)
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changed glances; and went downstairs to look。
The console screen was slowly printing out letter groups。
CQX VDX MOP IM
〃Is that Jerry?〃 Norman asked。
〃I don't think so;〃 Harry said。 〃I don't think he would go back to code。〃
〃Is it a code?〃
〃I would say so; definitely。〃
〃Why is it so slow?〃 Beth said。 A new letter was added every few seconds in a steady; rhythmic way。
〃I don't know;〃 Harry said。 〃Where is it ing from?〃
Harry frowned。 〃I don't know; but the transmission speed is the most interesting characteristic。 The slowness。 Interesting。〃
''276'' Norman and Beth waited for him to figure it out。 Norman thought: How can we ever get along without Harry? We need him。 He is both the most important intelligence down here; and the most dangerous。 But we need him。
CQX VDX MOP LKI XXC VRW TGK PIU YQA
〃Interesting;〃 Harry said。 〃The letters are ing about every five seconds。 So I think it's safe to say that we know where it's ing from。 Wisconsin。〃
Norman could not have been more surprised。 〃Wisconsin?〃
〃Yeah。 This is a Navy transmission。 It may or may not be directed to us; but it is ing from Wisconsin。〃
〃How do you know that?〃
〃Because that's the only place in the world it could be ing from;〃 Harry said。 〃You know about ELF? No? Well; it's like this。 You can send radio waves through the air; and; as you know; they travel pretty well。 But you can't send radio far through water。 Water is a bad medium; so you need an incredibly powerful signal to go even a short distance。〃
〃Yes 。。。〃
〃But the ability to penetrate is a function of wavelength。 An ordinary radio wave is short…shortwave radio; all of that。 The length of the waves are tiny; thousands or millions