对无脊椎动物猎物的化学分析显示，不同物种之间的营养成分存在显著差异；即使在种内，营养成分也可能有很大的差异。
Chemical analysis of invertebrate prey reveals remarkable variation in nutrient composition among species; even within species, nutrient composition may vary considerably.
但是在研究者能够说出的范围内，角蛙蝌蚪是第一种能够发出声音的水下幼仔，同时也是第一种能够这样做的脊椎动物幼仔。
But as far as the researchers can tell, horned frog tadpoles are the first underwater larvae, and first larvae of any vertebrate, to make sounds.
目的：研究短期(1周)和中期(6周)内单纯的PD T疗法对脊椎骨力学和结构特性的作用。
Objective. To determine the short-term (1 week) and intermediate term (6 weeks) effects of a single PDT treatment on the mechanical and structural properties of vertebral bone.
背景：椎弓根螺钉贯穿脊柱前中后三柱，具有三维矫正作用，已成为标准的脊椎后路内固定方法。
BACKGROUND: Pedicle screw which passes through the three columns and has three-dimensional correction function, which has quickly become the standard posterior spinal internal fixation.
提供了用于将纵向的脊椎部件推进到顶部加载的脊椎植入件内的手术器械。
A surgical instrument is provided for urging a longitudinal spinal member into a top-loading spinal implant.
提示严重且僵硬的角状脊柱畸形患者，采用经后路全脊椎切除加椎弓根钉棒系统内固定可获得良好矫形效果。
No grafting shedding or loosening occurred. PVCR is an effective alternative and can obtain good correction for severe rigid angular kyphoscoliosis patients.
提示严重且僵硬的角状脊柱畸形患者，采用经后路全脊椎切除加椎弓根钉棒系统内固定可获得良好矫形效果。
No grafting shedding or loosening occurred. PVCR is an effective alternative and can obtain good correction for severe rigid angular kyphoscoliosis patients.
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