ultr asonic的解释n.超声波ultr asonic的例句Thedoctorsgavehimanultr asonicbrainscan.医生给他做了脑部超声波扫描检查。Aninstr umentthatinapainlessandnoninvasivemannerusesthedifferentialtr ansmissionandreflectionofultr asonicwavestocreateadetailedvisualimageofthebrain.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
