当然，超声波很早就已用于医疗成像，其应用的依据是声波在密度更大的组织中传播速度更快。
Ultrasound has, of course, long been used in medical imaging. It relies on the fact that sound travels faster through denser tissues.
但是，众所周知，海豚并没有任何精神上的义务感去治疗人类疾病，马里诺补充说道，海豚用于导航的超声波实在是太微弱了，从而根本不会有任何医疗作用。
But dolphins don't feel any spiritual imperative to heal humans, as far as anyone knows. Marino adds that the ultrasound that dolphins use to navigate is far too weak to have any medical effect.
目的探讨全自动清洗消毒器与超声波清洗机洗涤医疗器械的效果。
Objective Exploration of best effect on washing medical instrument between automatic cleaning sterilizer and ultrasonic cleaners.
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