按1：1选择配对群体(对照组)，配对条件包括初次或翻修手术、融合节段长度、诊断和年龄。
A 1:1 matched cohort (control group) was created based on primary or revision status, length of fusion, diagnosis, and age.
在寻找合伙人的时候，数十年的友谊并非先决条件，但我自己的经历让我知道，找到真正能与自己配对的人是多么重要。
A decades-long friendship is by no means a prerequisite when searching for a business partner, but my own experience has taught me the importance of finding someone who is truly your counterpart.
本文依据功率传输方程，导出了在失配条件下镜像法测量增益的简化公式，分析了失配对增益测量的影响。
A simplified formula of the gain measurement by the image method is derived according to the power transmissions equation. The effect of mismatch on the gain measurement is analysed.
因此，电子自旋配对不是共价键形成的原因，也不是先决条件，电子自旋配对只是双电子共价键的一个特点。
Therefore, the spin pairing is not cause of the formation of covalent bond, it is not also condition of first determining, the spin pairing is the only particularity of covalent bond of two electrons.
在条件反射阶段，呈现条件刺激物（CS）与无条件刺激物（UCS）的配对，使被试形成对条件刺激物的态度；
In the conditioning stage, experimenter present the pairing of conditioned stimulus (CS) and unconditioned stimulus (UCS) to the participants so that they could form attitude towards CS.
在条件反射阶段，呈现条件刺激物（CS）与无条件刺激物（UCS）的配对，使被试形成对条件刺激物的态度；
In the conditioning stage, experimenter present the pairing of conditioned stimulus (CS) and unconditioned stimulus (UCS) to the participants so that they could form attitude towards CS.
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