复数： ultrasounds

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As ultrasound technology spread , sex-selective abortions became widespread .

随着超声波技术的推广，性别选择性堕胎成为普遍现象。

It is diagnosed clinically and confirmed by ct , ultrasound , or mri .

该临床诊断可通过ct，超声，或磁共振检查加以证实。

The size of ultrasound scanners has been falling .

超声波扫描仪的体积，已逐步改小。

A more novel approach involves either radio waves or ultrasound technology .

较新的无线即使包括无线电波及超声波技术。

One layer projects ultrasound waves for tactile feedback .

一层能够投射超声波产生触觉回馈。