In 1990 the continent's total fertility rate was over six, compared with two in East Asia.
在1990年时非洲大陆的总和生育率超过6,而东亚为2。
Half of the Europeans received an increase in salary last year, compared with two-thirds of Americans.
他们中有半数在去年获得加薪,美国的加薪比例则为三分之二。
It will also be compulsory to have at least six weeks off after giving birth, compared with two at the moment.
在生产后,母亲们将至少必须休6周产假,而目前这一强制性产假为2天。
For his mathematical project, he compared two ways to estimate the square root of an integer, a number with no fractional parts.
VOA: special.2011.03.24
The two groups were retested four years later, and the study compared the results with the first test.
VOA: special.2009.10.21
The study compared patients who took three hundred twenty-five milligrams of aspirin at least two times a week with those who did not use aspirin.
VOA: special.2009.09.01
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