At last, based on all fundamental researches, there is an experiment has been carry out for ultrasonic measure method.

最后，基于所有基础性的研究对非接触式超声波测量井径方法进行了实验。

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Its mission is to carry out Martin's experiment on a much grander scale, pouring iron ore into the ocean in an attempt to stimulate plankton growth and assess the wider effects on sea life.

CNN: Topical waters