n.慢性
长期性.
The severity and the chronicity of the slips were graded. 并对滑脱的严重性和慢性化程度进行了分级。
Therefore, therapy should not be limited to the patients in lower stages of chronicity. 因此，治疗不应该仅仅局限于慢性较低程度的患者身上。
n.同步性；同时发生
