ultrasonic fetal heart beat detector

例句：

1. 1.The ultrasonic fetal heartbeat detector was used to monitor the baby's heart rate during pregnancy.
   超声波胎儿心跳探测器被用来监测孕妇怀孕期间的胎儿心率。
2. 2. The device is designed to detect the fetal heartbeat and provide real-time feedback to the mother.
   该设备旨在检测胎儿心跳并提供实时反馈给母亲。
3. 3.During labor, the ultrasonic fetal heartbeat detector can be used to monitor the baby's heart rate and help determine when it is time to push.
   在分娩过程中，超声波胎儿心跳探测器可以用来监测胎儿的心率，帮助确定何时进行分娩。