... 真空管常数 vacuum-tube constant 真空管电子学 vacuum-tube electronics 真空管放大器 vacuum-tube amplifier ...
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ELECTRONICS made a huge leap forward when the delicate and temperamental vacuum tube was replaced by the robust, reliable transistor.
当初强韧可靠的晶体管取代了脆弱不稳的真空管,为电子元件带来了飞跃性的进步。
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