Dr Parkman says his patients tense up – the dentist can see a tension come over them with that high-pitched sound of the drill.

帕克曼医生说，他的病人会紧张不安——牙医发现牙钻发出的高分贝声音使他们感到紧张。

Here's Dentist Dr Andrew Parkman, describing how some patients feel when they come to sit in his consulting chair: We kind of notice people as soon as the drill starts up.

牙医安德鲁·帕克曼博士描述了一些病人坐在他的咨询椅上时的感受: 钻头一启动，我们就会注意病人。