While infants laugh up to 300 times a day, that figure falls to an average of 6 laughs a day for teenagers and only 2.5 daily chuckles for those more than 60 years old, the survey found.

调查发现，婴儿一天能笑300次，十几岁的孩子平均一天笑6次，而年龄超过60岁的人一天只笑2.5次。

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In experiments on rice-groundnut rotation at Bhubaneswar, as an average of two years, increase in fertilizer levels did not effect yield of rice (Table 6.).

在布巴内斯瓦尔的稻-花生轮作试验中，二年平均来看，提高施肥水平并不影响水稻产量(表6)。

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On an average of two years, ZAU 6 and Danerbarley had the largest and lowest grain weight among 10 cultivars, respectively.

两年平均，浙农大6号和单二大麦分别为千粒重最高和最低的品种；

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According to recent studies, indigenous Mexicans have an average of 4.6 schooling years compared to a mean of 7.9 years among non-indigenous people.

UNESCO: Bilingual Literacy for Life

At the same time Vanguard's New York Long-Term Tax-Exempt Fund, with an average duration of 6.8 years, offered a yield to maturity of 3.8%.

FORBES: Hock Your House

After a recent two-week inspection, an IMF team praised the government for its fiscal management in a hard time, and says GDP should go on growing by more than 5% this year after expanding by an average of nearly 6% for the past nine years, Zambia's longest period of growth since independence.

ECONOMIST: Hope and worry in Zambia