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								- BPP评分越低 ,S/ D比值异常的发生率就越高。 The lower the BPP, the higher the abnormality of the S/D value.
 - C/D比值 cup/disk ratio
 - S/D比值 peak-systolic and diastolic ratio
 - 比值 ratio
 - 结果发现,出生体重符合孕龄(AGA)糖尿病孕妇(n=15),脐动脉,子宫动脉S/D比值与正常孕妇组比较,无明显差异。 Both Um and Ut S/ D ratio decreased with the advancement of gestational age in normal control group (n=20) and DM cases without large for gestational age (AGA) infant (n=15).
 - S玻璃纤维 S-glass fibre
 - 他在文件上签上姓名的首字母G.P.S。 He initialed the paper G.P.S.
 - 维生素D vitamin(e)
 - s-o-n-g拼成"song"一字。 s-o-n-g spells "song".
 - 籼S Xian S
 - β比值 β ratio
 - A/D转换器 A/D converter
 - D玻璃纤维 D-glass fibre
 - Y/B比值 Y/B ratio
 - DNA包装比值 packing ratio of DNA
 - D 25 - ( OH ) 2 Vit D3
 - 性病(略为V.D.) venereal disease
 - 比热比值 ratio of specific heat
 - 比值法 ratio method
 - d> (iv) the relationship between local short-term uses of man's environment and the maintenance and enhancement of long-term productivity