A quarter of all sea species spend at least a part of their life in a reef and many reefs are in cold or temperate waters.

四分之一的海洋物种在珊瑚礁中度过了它们一生中至少一半的时间，而且很多珊瑚礁处于寒冷或温和的水中。

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Overall, 21 percent of workers attend happy hours with co-workers and, of those, nearly a quarter go at least once a month.

总的来说，有21%的员工下班后会与同事共赴欢乐时光，而他们当中有近四分之一的人每月至少去一次。

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OS level fixes can be planned and should exist as part of the annualized project plan, at least once a quarter.

可以计划操作系统级别的修复程序，并应作为年度化项目规划的一部分存在，至少应每季度一次。

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Prime Minister Tony Blair has pledged to end child poverty within the next 20 years and reduce it by at least a quarter this year.

BBC: NEWS | UK | Northern Ireland | MPs study NI poverty

Data from the Centers for Disease Control found that only about a third of Americans consumed fruits twice a day and only a quarter ate vegetables at least three times daily.

CNN: Healthy habits: A month of living perfectly

To be eligible, analysts had to have followed at least five stocks in an industry group, or country or territory, during any three calendar quarters of 2012 and at least four stocks in the remaining quarter.

WSJ: The Wall Street Journal Ranks Asia's Best Analysts