When you turn on a transistorized radio, the sound comes on immediately; when you turn off, it fades out gradually.

你打开晶体管收音机，立刻就有声音，当你关掉它时，声音渐渐消失。

youdao

When you turn on a transistorized radio, the sound comes on immediately; when you turn off, it fades out gradually.

你打开晶体管收音机，立刻就有声音，当你关掉它时，声音渐渐消失。

youdao