A laser huge pulse irradiates on aluminium plates to cause ultrasonic waves. The waveform of the rear surface displacement produced by ultrasounds is detected with optical homodyne.

激光巨脉冲在金属铝块上产生超声波，由光学零差探测得到超声引起的后表面位移的波形。

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As you gradually learn to do this, even the most turbulent emotions fail to seize hold of you and instead dissolve, as wild waves rise and rear and sink back into the calm of the ocean.

当你慢慢做此修炼时，就算是最强烈的情绪也无法纠缠你，也会溶化；如同巨浪生起、高耸，而又沉没回到海洋的宁静中。

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According to Teruyuki Kato, the project's leader, this arrangement can measure a buoy's vertical motion with an accuracy of a few centimetres, which will pick up dangerous tsunamis in the open ocean where they are mere ripples on the surface (they rear up into killer waves only when they reach the shallows).

ECONOMIST: New ways of tracking these killer waves may help save lives

Once again, waves of movement perturb the crowd, catapulting the less vigilant into the rear ranks.

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