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

I got from a person that I worked with for two and a half years before coming here.

我在来这儿之前和他一起工作了两年半的时间。

写推荐书的人 - SpeakingMax英语口语达人

If a person donated the token to a group project, the token was worth half of that amount to each person in the group.

VOA: special.2009.03.03