横断面呈两侧收 缩之椭圆形， 在两侧中线靠背方有明显的侧脊 (lateral ridge)， 侧脊旁具小槽。 腹面拱圆， 背 部较平且较窄。
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由冰川和熔岩形成的侧脊叫冰碛。
These ridges formed by glaciers or lava flows are called moraines.
这些侧脊是由冰川形成的。
本文采用HRP逆行追踪与顺行溃变结合法对猫三叉神经尾侧脊束核-丘脑-皮质通路在丘脑腹后内侧核内的突触联系型式进行了研究。
The synaptic relationship between the trigeminothalamic terminals and thalamocortical projecting neurons were studied by using anterograde degenerating combined with HRP retrograde tracing methods.
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