| 释义 |
vacuum tubes
释义
真空管：一种电子元件，用于放大、开关、调制、检波等电子电路中。
例句
1·In semiconductor receivers transistors take the place of vacuum tubes .
在半导体收音机中晶体管代替了真空管。
《新英汉大辞典》
2·Vacuum tubes require DC voltage sources as well.
真空电子管也要求以直流电压为电源。
3·Vacuum tubes were hot, bulky, fragile and short-lived.
真空管温度高、体积庞大、脆弱且寿命短暂。
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