对同一组参与者进行惊吓测试，让他们坐在一个安静的房间，过一段时间，忽然一声枪响。发现参与者都跳了起来，并露出害怕的症状。

The same group was also subjected to a simple "startle" test of emotional reactivity in which they sat quietly until a loud gunshot sound crashed through the room.

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尽管离日落还有一个小时，我们忽然听见船上传来一声枪响。

Although there was another hour before the sun went down, we suddenly heard the sound of the ship's gun.

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