diffract/dɪˈfrækt; dɪ`frækt/ v[Tn]break up (a beam of light) into a series of dark and light bands or into the coloured bands of the spectrum 使（一束光）衍射（即将 一束光分解为一系列明暗有别的光带或有色的光谱谱带, 旧作绕射）.
牛津英汉双解词典