narrow filter造句

• These unusual densities of states were due to the discrete propagation modes peculiar to the photonic crystal composed of alternative left - handed and right - handed materials , and could be used to make very narrow filters totally different from any conventional types of filters
  这些禁带中的态密度是由左右手材料构成的一维光子晶体所特有的，它们可用于制造完全不同于常规滤波器的、频带狭窄的新型滤波器。