A maser is a collection of molecules — in this case, water — that amplifies light into a powerful beam.

一个脉泽就是一组分子(在这个话题下就是水分子)，它会把光线放大为强大的光束。

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But a powerful beam of subatomic particles could be used to crush nuclei together strongly enough so they fuse.

而强大的亚原子粒子束可以用来粉碎原子核，其强烈程度足以使它们融合。

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It depends on whether the crystal can emit a powerful beam of light.

这取决于晶体是否会发射出一束强光。

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At dawn, he could see that but for the roadside oaks everything was gone, burned off the face of the earth as if by a powerful beam of light, the house standing naked and singed in a field of white ash.

NEWYORKER: Idols

Given the risks of aiming such a powerful beam of high-intensity radiation at an Earth ground station, as well as the cost of building billions of dollars in infrastructure to collect the energy in space, the efficiencies you can get from terrestrial solar power seem a safer bet--at least for now.

FORBES: Galactic Gold Mine?

That happens because, provided those electrons that have given off light are quickly pumped back to their excited states, the light bouncing around between the mirrors will stimulate the production of yet more light and a powerful, coherent beam will emerge.

ECONOMIST: Optoelectronics