最后讨论了利用单交组合预测三交和双交组合遗传表现的有关问题。
The prediction of genetic behaviors of 3-way and 4-way crosses by single crosses was also discussed.
前言： 目的：总结膝部同一小切口双交锁髓内钉内固定治疗“浮膝”骨折的临床应用和意义。
Objective To summarize the application and clinical meaning of double interlocking intramedullary nailing treatment of floating knee fracture in a small incision.
从物理角度讨论了双闭环交/直流功率变换器系统的控制方案和工作原理。
The control scheme and operating principle of a double closed-loop AC/DC power converter system are discussed by using physics.
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