After a minute of this touching, the researchers threatened the abdomen of the mannequin with a knife while administering a common physiological stress test.
一分钟的接触之后，研究者们拿起一把刀，对人体模型的腹部进行威胁，同时进行一个普通的生理压力检测。
2
Customers sometimes foolishly test his handiwork by touching the sharpened edge.
顾客有时候愚蠢地拿手去触摸他磨好的刀锋，以测试他的手艺。
3
Researchers had 18 participants undergo a standard test in which a probe touching one hand is slowly heated.