现在该说说电子乐器了。除哈蒙德电风琴，这类乐器全是靠变换无线电真空管振荡而发声的。

Now we finally come to electronic instruments. In these instruments sounds are produced by varying the oscillations of radio tubes with the exception of the Hammond organ.

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Sandia公司的Simmons博士注意到，传统灯泡是最后一批还在使用真空管的装置，这项陈旧的技术在无线电和大多数电视上早就已经被取代了。

Conventional light bulbs are among the last devices that use vacuum tubes, an old technology that has long been replaced in radios and most televisions, notes Sandia's Dr Simmons.

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