ultrasonics造句
The
ultrasonics stopped and the light went soft.
超声波停了，灯光也弱了一些。
In medical and other applications of
ultrasonics , a variety of electronic instrumentation is used.
超声波在医学和其它应用中, 要使用许多电子仪器设备.
Machine parts of irregular shape can be washed very clean by
ultrasonics.
用超声波能把形状不规则的机件洗得很干净.