Mitchell's schedule on Monday included shuttling to the West Bank town of Ramallah for a meeting with Palestinian President Mahmoud Abbas.

VOA: standard.2009.07.27

And fixed versus variable speaks to whether you give a reward on a fixed schedule, every fifth time, or variable, sometimes on the third time, sometimes on the seventh time, and so on.

固定与变化则是相对于,你是否根据固定时程给予奖励而言的，每五次就给予奖励，或者是变化的，有时候在第三次上给予奖励，有时候则在第七次上给予奖励。

耶鲁公开课 - 心理学导论课程节选

you never know. There's always a chance a string quartet may someday pop up on the schedule.

VOA: standard.2010.04.26

In his speech in Atlanta, Georgia to the Disabled Veterans of America, Mr.Obama said the United States is on schedule to fulfill a pledge to transfer security responsibilities to Iraqi forces.

VOA: standard.2010.08.02