Several different applicator arrays are suitable for use with the system, and comprise generally cylindrical annuli which emit radiation toward a central axis.

几个不同的辐射器阵列适于和所述系统一起使用，并通常包括朝中央轴线辐射的柱形环体。

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In the mid-1970s, Hawking showed that black holes are in fact not entirely "black" but instead slowly emit radiation, which causes them to evaporate and eventually disappear.

在19世纪七十年代中期，霍金论证道，黑洞事实上并不是“全黑”的，而是在缓慢释放射线，这导致它们不断蒸发直至消亡殆尽。

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Experts know that portable device emit radiation which affects those wavelengths which aircraft use for navigation and communication.

专家知道便携式电子设备发出辐射能影响飞机导航和通讯所用的波长。

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There are not many devices which emit radiation at several million million cycles per second, and those that do exist are unwieldy.

ECONOMIST: Physics

The new work focuses instead on cold, dense masses of gas that have markedly less random motion, and which emit their radiation in the microwave part of the electromagnetic spectrum.

BBC: Supermassive black hole weighed using new scale

The change also will likely squelch pilot complaints about going through full-body scanners, some of which emit low levels of radiation.

CNN: U.S. pilots to get speedier screening procedures