focused transducer

例句：

1. 1.The focused transducer was used to detect the presence of a tumor in the patient's chest.
   聚焦式换能器被用来检测患者胸部肿瘤的存在。
2. 2.The engineer used a focused transducer to map out the area around the leak.
   工程师使用聚焦式换能器来绘制泄漏区域的周围。
3. 3.The focused transducer was able to pick up the faint signals from the distant planet.
   聚焦式换能器能够捕捉到来自遥远星球的微弱信号。