Before the flight went down, sensors gave conflicting information on air speed to the plane's computers, possibly because of ice.
VOA: special.2009.06.13
And the experimenter is back there with the speed knob and at random intervals he just speeds up the tape of their heart and then slows it down.
实验者回到实验室,带着录音设备,随机地,他加速了心跳的录音,然后又慢下来。
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