分子激发（molecular excitation）是指分子在各种因素的影响下其内能增加导致分子被激发。实质是分子内的电子运动、分子振动和转动激发到更高的能态。
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双语例句原声例句
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激发能改变每个分子吸收和发射光的方式。
The excitation energy changes the way each molecule absorbs and emits light.
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表明这一迹象的是撞击掀起的尘土中显示的红外线光谱中的一些谱线，其频率与水分子能量激发时所发出光线的频率相应。
The telltales are specific "lines" in the spectrum of infra-red light from the plume. These correspond to the frequencies of light given off when water molecules are energetically excited.
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然后激发分子在周围等待。
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So, if you use a black lamp or something and you excite something up to a higher energy level and then it relaxes back down to its lower energy state, it's going to emit a new wavelength of light, which is going to be visible to you.
如果你用一个紫外灯或别的,东西把某种分子激发到,更高的能级，然后它会掉回,到低能级，它就会释放,一个新的波长的光,这个光是可见的。
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So, antigens are molecules or pieces of molecules that stimulate an immune response.
所以 抗原是可以激发免疫反应的,分子或分子碎片
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