对后缀的集合来说，我们需要进行的运算包括添加新的后缀(或者增加一个已有后缀的频次)，然后选择一个随机的后缀。
For the collection of suffixes, the operations we need to perform include adding a new suffix (or increasing the frequency of an existing one), and choosing a random suffix.
研究发现，烟雾最浓的三天以及之后的五天暴露于烟雾的人群因心力衰竭症状接受急诊治疗的频次增加了37%。
The study found a 37 percent increase in emergency room visits for people with symptoms of heart failure during a three day period of dense smoke exposure and the following five days.
放射防护监督部门要加大卫生执法力度、增加日常监督检查频次，确保放射源安全合理运用。
The supervision agencies for the radiation protection should enhance law enforcement of health and increases the frequency of the regular supervision to guarantee the proper use of radiation sources.
随着任务频次增加，学习者的学习效果有显著提高。
The subjects' learning outcomes increased significantly with the increasing frequency of tasks.
结果还显示，当地球自转的季节性变化处于转折期时，该地区大地震的频次明显增加。
The result also indicates that when the seasonal variation of the earth's rotation is around turning point, the frequency of large earthquakes in these regions becomes obviously high.
小剂量多频次静脉补铁与间隔补铁均能改善MHD患者贫血、增加铁储备，且疗效相同。
Repeated low-dose iron supplementation and intermittent iron supplementation can improve anemia in MHD patients, and have the same effect.
小剂量多频次静脉补铁与间隔补铁均能改善MHD患者贫血、增加铁储备，且疗效相同。
Repeated low-dose iron supplementation and intermittent iron supplementation can improve anemia in MHD patients, and have the same effect.
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