Specter had been a Republican senator up until last year, when he switched to the Democratic Party, with the backing of President Barack Obama.

VOA: standard.2010.05.19

Almost--the best analogy here is backing up a computer.

最形象地说，这就像给电脑备份。

耶鲁公开课 - 心理学导论课程节选

In the course of backing itself up, there are sort of random events flash to consciousness and get put together in a coherent story.

在备份过程中，有些事件会随机地浮现到意识层面,被拼凑成一个连贯的故事。

耶鲁公开课 - 心理学导论课程节选