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

He smokes 20 cigarettes a day on an average.

他平均天天要抽20支烟.

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.

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 we would be spending £300 per day.

平均下来，我们每天要花费300英镑。

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.

He smokes ten cigarettes a day on an average.

他平均一天抽十根烟.

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.

She fascinated him, both on and off stage.

不管是台上还是台下的她，都让他着迷。

I was still working on and off as a waitress to support myself.

我为了糊口仍然间或去做服务员。

Power response is uniform, with smoother variations on and off-axis.

功率响应一致, 同轴和离轴变化更为平稳.

It rained on and off all day.

哩哩啦啦下了一天雨.

To our amusement, the actor jumped on and off the stage.

令我们感到有趣的是, 那个演员从舞台跳上跳下.

Rebecca and I had lived together on and off for years.

我跟贝丽卡时作时辍地一起生活了好多年.

The boat , which was swinging in an eddy, came on and off and pitched with violence.

飘荡在旋涡里的渡船, 一上一下猛烈地颠簸起来.

They went on and on till they came to a river.

他们走啊,走啊,一直走到河边.

And giving you for thousands of years down. No vacation, on and on and on.

她的默默奉献已经持续了千年, 并将继续下去.

You know life will still go on and on and on.

你知道日子还是会不停前进的.

I can go on and on and on about the perils of my past.

我可以继续和就和就有关危险我的过去.

The ( Changjiang ) River rolls and roars on and on for a thousand li.

大江奔腾,一泻千里.

Infinite things go on and on and on, forever.

无穷的东西是永远永远继续下去的.