Doctor Yusuf said the single pill, taken once a day, could reduce the average person's risk of heart disease and stroke by about half.

VOA: special.2009.04.08

Remember, this thing only runs for sixty days and you could compute your sixty-day return, but people like to compare annual returns-- once again, a tradition we have.

注意,这个债券期限只有60天,当然你可以计算60天的收益率,但是人们往往喜欢用年收益率进行比较,这也是一种传统

耶鲁公开课 - 金融市场课程节选

We practice once or twice a day,

我们一天训练一到两次，

斯坦福的赛艇队 - SpeakingMax英语口语达人

Some of them took a seventy-five milligram baby aspirin once a day.

VOA: special.2010.12.14

I have a friend who once claimed to me that he wanted to live forever so that he could have Thai food every day for the rest of, well, the rest of eternity.

一位朋友曾对我宣称,他希望永生以便在,以后无尽的日子里每天吃泰国菜。

耶鲁公开课 - 死亡课程节选

In the end, they are permitted to meet just once a year, on the seventh day of the seventh lunar month.

VOA: special.2010.02.08

Jurgen Rehm said having one or two drinks a day is not as harmful as having seven drinks at once.

VOA: special.2009.09.08

U.S.officials, including the number-two American commander here, Army Lieutenant General Charles Jacoby, say such occasional spectacular attacks are,in a way, evidence of the decline of al-Qaida in Iraq, which once staged dozens of attacks every day.

VOA: standard.2009.12.11

"The more people we can get on the roads with bikes the better." There will be 6,000 bikes available, and the mayor hopes once it gets rolling, this system will result in 40,000 bike trips a day.

VOA: standard.2010.07.30