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

And the thing about what Schrodinger did was all he imposed on a system was the electron behaves as a wave and is bound.

薛定谔所做的,是建立在一个系统之上,电子是像波一样运动的并且是有界限的。

麻省理工公开课 - 固态化学导论课程节选