DSabbr.数据服务（=Data Services）DS-SS signal直接序列扩频信号dsaster backup灾难备份Ds-Ac system(=Dissociation-Actinator System) 解离-激体体系Dsign principle设计原则DS/SS signal直接序列扩频信号ds nucleic acid双链核酸DS-SS/BPSK直接序列扩谱／二进制相移键控DSB transmitter双边带发射机Dsbois's disease肺燥Dsbois's abscess干度检验器