pseudoumbilicus

例句：

1. 1. The anatomist described the pseudoumbilicus as a unique feature of the human spine.
   解剖学家描述了伪双叶胸椎作为人类脊柱的独特特征。
2. 2. During surgery, the surgeon identified the pseudoumbilicus and removed it to prevent infection.
   在手术中，外科医生识别了伪双叶胸椎并切除它以防止感染。
3. 3. The pseudoumbilicus is a crucial part of the human body's structure that plays a vital role in supporting the lungs and heart.
   伪双叶胸椎是人体结构中至关重要的部分，它支撑着肺部和心脏发挥着重要作用。