vacuumlead

例句：

1. 1.The vacuum tube was the first electronic device invented by Edison.
   真空管是爱迪生发明的第一个电子装置。
2. 2. The vacuum tube was used in radios and televisions for decades.
   真空管在收音机和电视机上使用了几十年。
3. 3. The vacuum tube is still used in modern electronic devices.
   真空管在现代电子设备中仍然被使用。