ultrasonic stethoscope

例句：

1. 1. Doctors useultrasonic stethoscopesto listen to the heartbeat of theirpatients.
   医生使用超声波听诊器来听患者心脏的跳动。
2. 2. Theultrasonic stethoscope is a medical devicethat uses high-frequency sound wavesto detect internal body structures.
   超声波听诊器是一种医疗设备，它使用高频声波来检测体内结构。
3. 3. During surgery, doctors often use ultrasonic stethoscopes to monitor the patient's vital signs.
   在手术期间，医生经常使用超声波听诊器来监测患者的体征。