The experts also said people should take less than four thousand milligrams of acetaminophen in a single day.

VOA: special.2009.07.08

In essence, this collapse in stock prices -the one-day collapse in stock prices -I think in the U.S. The price was, depending on which index you were looking at, were down 21-22% in a single day.

实际上,这次股价暴跌,股价一天内的跌幅,当然在美国国内,要看你参考的是哪种股指,但基本上一天之内暴跌21-22%

耶鲁公开课 - 金融市场课程节选

They also said people should take less than four thousand milligrams of acetaminophen in a single day.

VOA: special.2009.07.21

A new study looked at a single day of more than 1,200 intensive care units, or ICUs,in 75 countries.

VOA: standard.2009.12.08