One phone was turned off, while the other had an active call going for 50 minutes. It was muted to prevent the audio from having effects on brain activity.
其中一部手机处于关机状态，而另一部手机保持通话状态50分钟，不过这部手机被调成了静音模式以防止声音本身对脑部活动有影响。
One phone was turned off, while the other had an active call going for 50 minutes. It was muted to prevent the audio from having effects on brain activity.
其中一部手机处于关机状态，而另一部手机保持通话状态50分钟，不过这部手机被调成了静音模式以防止声音本身对脑部活动有影响。
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