该文探讨了一种三自由度(DOF)平行双关节坐标测量机的测量原理和测量模型。
This paper investigates the measurement principle and model of a parallel dual-joint coordinate measuring machine (PD-CMM) which has three degrees of freedom (DOF).
如果你能做到，那么你可能拥有双关节。但是，《科学一刻》想知道，一个人怎么可能拥有双关节呢？
If you can, you might be what some people call "double-jointed." But, a Moment of Science wonders, how could anyone have double joints?
然后，模拟生物神经的整合作用，在单关节运动控制系统的基础上建立了机器人双关节耦合控制系统。
Then, with the simulation of biological neural integration, this paper built a coupling control system of a single robot leg of two joints based on the single joint control system.
传统的机器人手臂仅含有类似于单关节肌的执行器，而生物的手臂不仅含有单关节肌还含有双关节肌。
Conventional robot arm has only actuators similar to mono-articular muscles, though animals arm has not only mono-articular muscles but also bi-articular muscles.
文中利用改进四参数DH模型导出平行双关节坐标测量机的测量模型，在此基础上建立该坐标测量机的误差模型。
An improved four-parameter DH model is used to deduce the double parallel-joint CMM measurement model. Error model of the double parallel-joint CMM is discussed based on the measurement model.
本文对外动力式双关节单自由度下肢截瘫步行器的助行机理和设计方法进行了研究，论述了研究截瘫步行器的必要性和可行性。
The principle and designing of a new kind of walking device with two joints of single degree of freedom are presented in this paper.
韧带与肌腱通常会限制关节的活动，但是对于某些人来说，这些结缔组织非常灵活，能做出更大范围的运动，也就是我们所称的“双关节”。
Ligaments and tendons usually restrict the movement of the joint, but in some people, these normally restrictive tissues can be quite flexible and allow the extra movement we call "double-jointed."
结论肋头关节面多分为单、双两种形态，其中第3～10肋双关节面出现率更高，且形态变异较大，可能是双关节面更易出现肋头关节劳损与错位的重要原因。
Conclusion The articular surface of costal head is divided into single form and double form. Double form is prone to appear in 3 to 10 costal ribs with more morphological variations;
结论肋头关节面多分为单、双两种形态，其中第3～10肋双关节面出现率更高，且形态变异较大，可能是双关节面更易出现肋头关节劳损与错位的重要原因。
Conclusion The articular surface of costal head is divided into single form and double form. Double form is prone to appear in 3 to 10 costal ribs with more morphological variations;
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