double comparative evaluation 二次相对评价
double-blind comparative study 双盲对照研究
Comparative research of complication in perioperative period of single knee joint and double knee joint replacement.
单膝关节和双膝关节置换术围手术期并发症的对比性研究。
Methods: To adopt a random, double-blind and placebo comparative research.
方法：采用前瞻性随机双盲、安慰剂对照研究。
This article relies on the design of the Yunnan Biyun Bridge for single and double limb box high pier in detail the overall stability of a comprehensive comparative analysis.
本文依托云南碧云大桥的设计方案，对单、双肢箱型高墩进行了详细全面的整体稳定性对比分析。
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