Only low cost or high costeffectiveness interventions are included at this level. 在這個治療水平中僅僅包括消費最低和性價比最高的干預措施。
As interleavers have a fairly high cost performance, they have been extensively used in narrow interval DWDM systems. 摘要梳狀分波器由於具有較高的性價比,在窄間隙密集波分復用系統中已大量使用。