ultrasonic

形容词 ultrasonic:

1. having frequencies above those of audible sound
   同义词：supersonic

1. An instrument that in a painless and noninvasive manner uses the differential transmission and reflection of ultrasonic waves to create a detailed visual image of the brain.
   超声波心动描记器一种用来显示详细的大脑图象的仪器，利用超声波发送和反射的差异来测试并无伤无痛
2. The doctors gave him an ultrasonic brain scan.
   医生给他做了脑部超声波扫描检查。