例句與造句

1. author keywords biomechanical analysis; cerical spine; atlas; axis; arthrodesis; instrumentation; odontoidectomy; spinal instability
   關(guān)鍵詞：生物力學(xué)分析；頸椎；樞椎；軸；關(guān)節(jié)固定術(shù)；器械；齒突切除；脊柱穩(wěn)定。
2. It's difficult to find spinal instability in a sentence. 用spinal instability造句挺難的