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在某一特定时间，一般人群中患有活动性癫痫(即具有持续性癫痫发作或者需要治疗者)的比例估计在每千人口4至10人之间。
The estimated proportion of the general population with active epilepsy (i.e. continuing seizures or the need for treatment) at a given time is between 4 to 10 per 1,000 people.
最近的研究表明，女孩在一些武装集团中的比例估计高达40%，这些女战士在最近20年曾在近40场战争中出现过。
Recent studies estimate that girls represent as high as 40 percent of fighters in some armed groups. Girls have fought in nearly 40 wars in the last two decades.
科学家们从乌鸦那里收集了样本，以估计它们食物中幼虫的比例。
Scientists have collected samples from crows in order to estimate the proportion of larvae in their diet.
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