Today,Merlefest lasts for four days, with more than 100 performers playing on 15 stages.

VOA: standard.2010.06.07

For four days, the three of them fed on the body and blood of the cabin boy.

整整四天，他们三个,靠派克的尸体和血液为食。

耶鲁公开课 - 公正课程节选

What you'll do is every day for the next 30 days give me one cent, next day two, four, eight and so on.

你们要做的是在未来30天给我一分钱，第二天二分，然后是四分，八分，以此类推。

哈佛公开课 - 幸福课课程节选

In August,eighteen sixty-four, Lincoln wrote:"For some days past, it seems that this administration probably will not be re-elected.

VOA: special.2009.12.10

For two days,since the ship sank, the four men had been struggling to reach land.

VOA: special.2010.03.06

Tens of thousands of Scouts from all 50 states and 26 other countries come to the United States every four years for 10 days of adventure and fun.

VOA: standard.2010.07.31

"For now it's like a honeymoon." "People come and see their products and IOM facilitated them to go to an expo in Jakarta and they made like 10 million rupiah in four days but they also need to understand how they can allocate that for their own promotion activities."

VOA: standard.2010.04.14