He said his team took saliva samples from the study participants to measure levels of testosterone, a hormone that indicates sexual arousal, before and after they listened to recordings of the cars.

• 他说，他的团队在研究参与者聆听汽车录音的之前与之后分别取出其唾液样本，以测量睪固酮浓度，这是一种能显示性兴奋的荷尔蒙。