They did this by putting pieces of silicon or one of a number ofother solid materials inside a shoe-box-sized cavity and zapping the materialwith microwaves from a metal tip.

他们将硅碎片或者其他种固态物质中的一部分放入一个鞋盒大小的腔中，并且用金属末端放出的微波来轰击这些物质。

youdao

And then a theory on the penetrating depth, the number of impact and the relation between penetrating resistance and depth was obtained by means of dynamic spherical cavity expansion.

应用动态球腔扩张理论，建立了冲击贯入方程、冲击次数表达式和贯入阻力与贯入深度的关系。

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Then, a number of numerical results for microstrip fractal patch antennas residing in a cavity are presented.

在此基础上，对背腔式分形微带贴片天线的电磁散射特性进行了计算和分析。

youdao

They did this by putting pieces of silicon or one of a number of other solid materials inside a shoe-box-sized cavity and zapping the material with microwaves from a metal tip.

ECONOMIST: Ball lightning