英语翻译By the late 50s though,as vacuum tubes were being replac

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英语翻译
By the late 50s though,as vacuum tubes were being replaced by bipolar junction transistors (BJT),tubes survived only in niche applications,such as wideband distributed amplifiers,as the BJT is basically a low to medium impedance device,and as such,is not very compatible with distributed amplifier theory.

但是到50年代后期,由于真空管被双极性接面电晶体（BJT）所替代,真空管只在小的应用欢迎幸存,如多频分布式放大器.因为BJT基本上是低阻抗到中阻抗的设备,由于此,不太兼容于分布式放大器原理.

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