American children now spend an average of seven and a half hours a day watching television or playing with electronic devices.

VOA: special.2010.06.07

Okay. How many people would say they were off by an average of zero to ten percent?

多少人低估了,平均从0到10%

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It's got an average valence electron energy of about 16 eV, 16.5 eV, which is a lot greater than 11.

它的平均价电子能,大约是16eV，16。5eV，那比11要多很多。

麻省理工公开课 - 固态化学导论课程节选

Assuming an average of 20 claims each, that is 5, 000, 000 restrictions on smartphone innovation.

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Construction lost 64, 000 jobs, compared with an average of about 40, 000 in the previous three months.

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