“衍”的拼音为：yǎn...

色泽是反射和衍射的综合效果.Lustre is the integral effect of reflection and diffraction.在这种情况下,据说,波发生了衍射.In this case the wave is said to have been diffracted.显然,衍射以及干涉是波特性.Evidently diffraction, as well as interference, is a wave pro...

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