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.
The team knew from experiments done by other groups of researchers that ultrasound can have a physical effect on tissue.
根据其他研究团队既往的试验，该小组认识到超声波可对组织产生物理效应。
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Five minutes of ultrasound - a technique normally associated with scanning babies in the womb - had a similar effect, an American Chemical Society conference heard.
有人在美国化学学会大会(American Chemical Society conference)上说，5分钟的超声波(一项与孕期胎儿检查有关的常用技术)作用，也有类似的效果。