If your sensor could analyse results in real time and could bleep to tell you that you had lost in a negotiation, it would save you the trouble of ploughing on.

• 通过追踪语调，他们发现，声音跌宕起伏的人，在销售方面远远胜过那些语调平缓的人。这种效果跟母亲给婴儿唱歌类似。