The isthmus, or pars interarticularis, is a small, thin segment of bone that connects the facet joints at the back of the spine.
峡部或称椎弓峡部，是脊柱背侧连接上下关节突之间的一段小而细的骨段。
The structural design of thin type circular diamond sawblade mainly included designing of sawblade core and diamond segment, both of them were discussed in this paper.
薄型金刚石圆锯片的结构设计主要包括锯片基体与金刚石刀头的设计，在文章中对两者均作了论述。
In cases with the absence of extraocular muscle, only could a very thin reflective echo be detected at the ocular anterior segment by UBM.
眼外肌缺如时ubm在眼球前部不能探测到眼外肌或仅能测及极薄的高回声。
In cases with the absence of extraocular muscle, only could a very thin reflective echo be detected at the ocular anterior segment by UBM.
眼外肌缺如时ubm在眼球前部不能探测到眼外肌或仅能测及极薄的高回声。
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