To meet the requirements of miniaturization, high gain and wideband of UHF antenna for aircraft SAR, the gain loss produced by narrowing back cavity of short back radiation antenna is analyzed.

针对超高频机载合成孔径雷达天线小型化、高增益和宽频带的问题，分析了短背射天线缩小背腔的增益损失。

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More infrared radiation would be absorbed and reradiated back to the Earth's surface.

更多的红外辐射将被吸收并重新辐射回地球表面。

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When conditions are hot, the ostrich erects them on its back, thus increasing the thickness of the barrier between solar radiation and the skin.

当天气炎热时，鸵鸟会把它们背在背上，这样就增加了太阳辐射与皮肤之间的屏障厚度。

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The bass reflex port is optimally positioned to ensure the twin woofers drive accurately and with synchronous timing, controlling back radiation and to help eliminate sound distortion.

ENGADGET: Sony reveals SS-AR2 loudspeaker, wants an invite to your next house party

Two thick birch partitions and a small air cavity create a well-insulated enclosure inside the cabinet, separating the midrange and tweeter from the woofers, further isolating woofer back-radiation.

ENGADGET: Sony reveals SS-AR2 loudspeaker, wants an invite to your next house party

They also conclude that greenhouse warming has partially been offset by the cooling effect of aerosols - tiny particles of dust thrown into the atmosphere that can reflect solar radiation back into space.

BBC: Climate research bolsters 'action' call to UN talks