n.污泥密度指数

[=spectral difference index]谱差指数
[=state disability insurance plan]州伤残保险计划,国家病残保险计划
[=succinic dehydrogenase inhibition]琥珀酸脱氢酶抑制

< SDI >
Strategic Defense Initiative战略防御计画, 星球大战计画 的缩写