Clouds return radiant energy to the surface primarily via the atmospheric window.

云主要通过大气窗区向地表辐射能量.

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They give off discrete amounts of radiant energy.

它们放出不连续的辐射能量.

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Material energy can be transformed into radiant energy only in units of a certain size.

物质能量只能以一定大小的单位转变为辐射能量.

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Such a surface would reflect no radiant energy, and hence would appear black in color.

这种表面不会反射辐射能, 因此呈现黑色.

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Radiant energy entering the opening is in part absorbed by the interior walls.

进入小孔的辐射能,一部分为内壁所吸收.

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No surface can absorb more than all of the radiant energy which strikes it.

表面所能吸收的能量不可能大于投射到它上面的全部辐射能.

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Carbon black is an opacifier which prevents radiant energy transmission to the interior of the propellant.

炭黑是不透明的,可以防止辐射热传到推进剂内部.

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We know that light is a variety of radiant energy.

我们知道光是一种辐射能.

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The amount of radiant energy needed to expose a photographic film.

感光胶片上曝光所需的辐射能的总量.

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Different kinds of radiant energy have certain fundamental characteristics in common.

不同种类的辐射能却有着某种共同的基本特性.

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Quantum theory proposes that radiant energy is transmitted in discrete units.

量子理论的提出辐射的能量能传递离散的单位.

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Radiant energy is also called energy.

辐射能也称作光能.

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We consider radio waves as radiant energy.

我们把无线电波看作是辐射能.

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For a fixed set of conditions, any free surface emits radiant energy of varying wavelengths.

在一定的条件下, 任何自由表面均会散发各种波长的辐射能.

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It is not until the radiant energy falls upon matter that it becomes heat energy.

直到幅射能落到物质上以后,它才能变成热能.

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