On average, a lot is sold every three seconds.

这里平均每三秒就能卖出一大批。

On average, about 20% of the population has some form of disability.

平均而言，大约 20% 的人口有某种形式的残疾。

Oh, on average. -Oh, an hour already today.

喔，平均。 -今天已经用一小时了。

On average, Ebola kills half the people it infects.

平均来说，埃博拉感染者的死亡率为50%。

Adult great whites reach 15 feet on average.

成年的大白鲨平均会长 15 英尺。

Each person infects 1.3 other people on average.

即每个已感染者平均传给1.3个人。

On average (or typically), they serve 15 years.

平均说来（或通常），他们会任职15年。

On average, men are better educated than women.

平均而言，男性受教育程度高于女性。

For about one and a half hours on average.

平均一个半小时吧。

The fact is, college graduates, on average, earn more.

事实上，大学毕业生的平均收入更高。

That's what they say it will take on average.

这8分钟说的是平均时间。

Virtually all civilizations end, on average after 340 years.

文明平均在三百四十年后都会瓦解。

They were replaced within about three months on average.

而该职位的空缺时间平均只有3个。

On average, we work five hours overtime each week.

平均而言，我们一星期加班5小时。

We've saved on average about $3,000 a month.

我们平均每个节省了$3,000。

On average, a family here has five to six children.

这里平均每个家庭有五六个孩子。

Like how much do you on average pay for shoes?

你平均花多少钱买鞋？

And they detected the human 61 meters away on average.

这些鸟在平均61米外就能探测人类。

Bears on average, they might catch 10 fish per day.

平均来说，熊每天可能会捕 10 条鱼。

Or, " Elephants live for 60 or 70 years on average."

或者，“大象平均能活 60 或 70 岁。”