It will last about two years before the rubber pipes need to be replaced.

VOA: special.2009.04.20

And now in the past couple of weeks, I've been working on a small experiment, which is intended to show how we can be replaced by a computer.

在前几周内，我一直在做一个,小实验，打算,说明我们怎么样才能被计算机代替。

哈佛公开课 - 计算机科学课程节选

When it was his turn to speak, Mr.Obama said old grievances in the hemisphere should be set aside, replaced by a renewed commitment to expand prosperity, security and freedom in the Americas, with all nations working as equals to confront common challenges.

VOA: standard.2009.04.17