在前人的基础上，作者为元认知总结出一个新的框架，即元认知包括元认知知识和元认知策略，并接着评析了两者的关系。

On the basis of previous frameworks, the author concludes a framework which involves metacognitive knowledge and metacognitive strategies, and then appraises the relationship between them.

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接着本文还介绍了关于声空化的基本知识和理论，总结了前人的研究声空化强度的测量的方法。

Then this article also introduces the acoustic the basic knowledge and theory on cavitation, and sums up the previous measurement methods of acoustic cavitation intensity.

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