The ultrasonics stopped and the light went soft .

超声波停了，灯光也弱了一些。

Ieee transactions on ultrasonics , ferroelectrics and frequency control .

超声学、铁电体技术与频率控制汇刊。

Experiments with ultrasonics and brain lesions are done by universities .

超音波实验和脑病变是在大学完成。