occurrence in peak period 发生高峰期
occurrence in life 生活事件
occurrence in spring 春季活动
occurrence in the same field 同场共生
water occurrence in oil wells 油井见水
maximum occurrence in minimization 出现频率最大
sudden occurrence in public health 突发公共卫生事件
One of them is a word counter, which counts for certain word occurrence in several files.
其中之一是单词计数器，它统计某一单词在几个文件中出现的次数。
Domestic violence is a regular occurrence in some families.
在某些家庭中，家庭暴力是常事。
Fatal coach crashes are said to be a weekly occurrence in Peru.
在秘鲁每周都会发生毁灭性的汽车相撞事件。
Pandya says this is a common occurrence in Eastern European countries.
VOA: standard.2009.08.21
"Our best success has been in pap smear, for the detection of cervical changes before actually the occurrence of cancer."
VOA: standard.2010.03.25
In the North Caucasus, attacks on officials and law enforcement officers are a regular occurrence.
VOA: standard.2009.12.12
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