The listeners were then asked to identify which of the paired recordings from each species represented a sound of distress or emotional arousal.

然后，研究人员让志愿者辨别出每个物种表达“痛苦”或“情绪激发”的录音。

Any emotional arousal will simmer down if you just wait long enough.

如果你等的时间足够长，任何情绪的激发都会慢慢平息下来。