relapse rate的用法和樣例：
例句
- The recurrence rate, disease free interval, and adverse reaction after operation were observed.
觀察術后複發率和無瘤間期及不良反應發生情況。 - None of the studies reported serious side effects, and rates of sinusitis relapse were similar between the treatment and placebo groups.
這些研究均沒有報道嚴重的副作用，並且鼻竇炎的複發率與安慰劑治療組相類似。
