on an average

He smokes 20 cigarettes a day on an average.

他平均天天要抽20支烟.

On an average day you take 15,000 steps and foot perspires 200 ml of sweat.

平均每一天你的脚要迈15,000步,同时分泌出200毫升的汗液.

On an average day, they now spend 7 andhalf . 5 hours using media.

现在平均每天, 他们花费7.5个小时使用媒体.

On an average we would be spending £300 per day.

平均下来，我们每天要花费300英镑。

Doctors work an average of 90 hours a week, while a few are on call for up to 120 hours.

医生每星期平均工作90个小时,有几个24小时候命,达到了每周120个小时.

They went to the theatre on an average of 10.3 times a year.

他们平均每年去剧院十点三次.

On an average day, they now spend 7 . 5 hours using media.

现在,在平常日子, 他们每天要花上7.5个小时.

Each quarry on an average employs about 120 workers.

每座矿山平均雇佣120个工人.

Kelly had scored an average of 147 on three separate IQ tests

凯利在3项不同的智商测试中平均得分147。

On an average we would be spending £ 300 per day.

平均下来，我们每天要花费300英镑。

Parents spend an average of$ 220 a year on toys.

父母为孩子买玩具的花费每年平均为220元。

He smokes ten cigarettes a day on an average.

他平均一天抽十根烟.

As a reasonable guess , they might, on an average, be 100 light years away.

据合理推算, 外星人离我们平均距离也有100光年之远.