Flurry tracked nearly 3 million active users of eBook apps in July, up from just around half a million in March.
Flurry在七月跟踪了电子书应用程序的300万名活跃用户，而这一数字在三月仅为50万。
Researchers from the Albert Einstein College of Medicine in New York tracked the health of more than 500 elderly men and women for four-and-a-half years.
纽约艾尔·伯特·爱因斯坦医学院(albert EinsteinCollegeof Medicine)的研究人员在四年半时间里跟踪调查了500名以上老年男性和女性的健康状况。
During totality, the Moon tracked through the northern part of the Earth's dark umbral shadow, so the southern half appeared considerably darker than the northern part.
在月全食的过程中，月亮会经过地球本影的北部，因此月亮下半部分会比上半部分暗一些。
The National Center for Atmospheric Research in Boulder, Colo., has tracked half a century of declining rainfall on the continent.
科罗拉多博尔德美国大气研究中心(TheNational CenterforAtmospheric Research)的跟踪数据显示，半个世纪以来非洲大陆的降雨日趋减少。
The National Center for Atmospheric Research in Boulder, Colo. , has tracked half a century of declining rainfall on the continent.
科罗拉多博尔德美国大气研究中心（TheNational CenterforAtmospheric Research）的跟踪数据显示，半个世纪以来非洲大陆的降雨日趋减少。
Researchers tracked the activity of 30 popular Android apps and found that half reported info to third-party advertisers.
研究人员追踪研究了30个当今比较流行的Android程序进行的活动，发现他们报告的信息，半数以上都给了第三方广告商。
The researchers, writing today in the journal Cancer Epidemiology, Biomarkers & Prevention, tracked about 3,000 women in Shanghai, about half of whom were diagnosed with breast cancer.
今日在《癌症流行病学、生物标记和预防》杂志上撰文的研究人员追踪了上海3，000名妇女，其中约一半的人被诊断患有乳腺癌。
About half the patients were given Vytorin and the other half placebo, and were tracked for an average of more than four years.
接收调查的患者有一半服用维多灵，另一半人服用安慰剂，平均被追踪观察四年之久。
Half of the browsers we tracked were in decline.
过半的浏览器市场份额下降。
Half of the browsers we tracked were in decline.
过半的浏览器市场份额下降。
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