1. The old radio uses a vacuum tube to amplify signals.
这台老式收音机使用电子管来放大信号。

2. Students learned how a vacuum tube works in class.
学生们在课堂上学习了电子管的工作原理。

3. A vacuum tube was an important component in early computers.
电子管是早期计算机的重要部件。

4. The engineer repaired the vacuum tube amplifier.
工程师修理了电子管放大器。

A: What is a vacuum tube?
A：什么是真空管？

B: It is an electronic device used to control and amplify electrical signals.
B：它是一种用于控制和放大电信号的电子器件。

1) 真空管

2) 电子管

3) 早期电子设备核心元件

4) 用于信号放大和控制的器件

5) 晶体管出现前广泛使用的技术

1. 在真空环境中控制电子流的电子器件；电子管。

e.g. The vacuum tube was widely used before transistors became common.
在晶体管普及之前，电子管被广泛使用。

2. 早期电子设备中的信号放大和开关元件。

e.g. This museum displays several historic vacuum tubes.
这家博物馆展出了几种历史电子管。

noun

1. An electronic device that controls the flow of electric current through a vacuum and is used for amplification, switching, or signal processing.

2. A component widely used in early radios, televisions, and computers before the invention of transistors.

Synonym: electron tube, thermionic valve