pulse frequency spectrum

例句：

1. 1. The heart rate spectrum is a useful tool for monitoring the health of an individual's heart.
   心率谱是监测个体心脏健康状况的一种有用工具。
2. 2.The doctor used the pulse wave spectrum to diagnose the patient's condition.
   医生利用脉搏波形谱诊断了病人的状况。
3. 3. The study analyzed the pulse frequency spectrum to understand the impact of stress on the human body.
   该研究分析了脉搏频率谱，以了解压力对人身体的影响。