Uno,zero,cinco,cinco,". Simmons says Cuba's intelligence agency still prefers short wave radios and face-to-face meetings over computers and more advanced technology.

VOA: standard.2009.06.06

psi I mentioned that we can also solve for psi here, which is the wave function, and we're running a little short on time,

我说过我们也可以解,波函数，我们讲的稍微有点慢，

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Simmons say Havana has long relied on short wave radio to send encoded messages using a system that converts letters into numbers.

VOA: standard.2009.06.06

Authorities say the couple also used short wave radio to take orders from Havana and to transmit information.

VOA: standard.2009.06.06

He says unlike e-mail, the short wave transmissions are almost impossible to track.

VOA: standard.2009.06.06