Pathological changes for the main mast facet osteoarthritis and spinal canal stenosis, and segmental instability, disc degeneration, spondylolisthesis and spinal ligament calcification, and other.
病理改变主要表现为关节突肥大性骨关节炎及椎管狭窄，以及节段性失稳、椎间盘退变、脊柱滑脱及韧带钙化等。
Main topsail: Shows the topsail added to the Main Mast.
主上桅帆：显示了主桅上的上桅帆。
I placed my palms against the main-mast, which was of a goodish bigness, and waited, every nerve upon the stretch.
我抱住相当粗的主桅等着，每一根神经都绷紧了。
I placed my palms against the main-mast, which was of a goodish bigness, and waited, every nerve upon the stretch.
我抱住相当粗的主桅等着，每一根神经都绷紧了。
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