Only low cost or high costeffectiveness interventions are included at this level. 在这个治疗水平中仅仅包括消费最低和性价比最高的干预措施。
As interleavers have a fairly high cost performance, they have been extensively used in narrow interval DWDM systems. 摘要梳状分波器由于具有较高的性价比，在窄间隙密集波分复用系统中已大量使用。
