He would design two to three instruments a month on an average.

他一般说来一个月设计两到三件仪器。

youdao

On an average, you can sell websites for 12 times its monthly income.

平均来说，你可以按网站月收入12倍的价格卖出。

youdao

Mani and his owner, Mr Muniyappan, see about ten customers on an average day.

鹦鹉玛尼与其主人穆尼亚潘先生平均每天接待10位主顾。

youdao

On an average day,it says, almost twenty-seven thousand doctors, nurses and others work in teams of local and foreign aid workers.

VOA: special.2010.07.26

One person might be a little low one day, another person might be high, a lot of people might-- you might happen to have captured them on an average day, but overall it averages out, so you get a representative sample.

一个人可能某一天少吃些,另一个人可能多吃些,很多人都会这样,你可能正好得出人们,平均每天的摄入量,但把它的整体平均一下,就得到有代表性的结果

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Um, definitely, I think on average an accountant is considered to be, you know, a bean counter,

当然，我觉得会计师常被认为是精打细算的人，

会计学很有意思 - SpeakingMax英语口语达人

On an average day, the hospital treats about 450 people in accident and emergency.

BBC: Queen's Medical Centre A&E reports 20% rise in patients

Researchers interviewed 2, 800 students and based the projection on an average course length of 3.4 years.

BBC: Average UK student debts 'could hit ?53,000'

Mighty Leaf spends 20 cents on an average tea bag--the couple contracts out the production of the bags.

FORBES: Magazine Article