n.慢性
長期性.
The severity and the chronicity of the slips were graded. 并對滑脫的嚴重性和慢性化程度進行了分級。
Therefore, therapy should not be limited to the patients in lower stages of chronicity. 因此，治療不應該僅僅局限于慢性較低程度的患者身上。
n.同步性；同時發(fā)生
