这台机器现在正在录制中。
Do you remember how to operate this recording machine?
你记得怎样使用这个录音机吗？
The original audio recording playback machine was at least the length of a football field.
原来的录音播放机是在至少一个足球场的长度。
The original audio recording playback machine was at least the length of a football field.
原来的录音播放机是在至少一个足球场的长度。
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