We have seen cases where we have been gone five and ten years and we go back and they have developed roads and built schools, and they have other communities receiving the animals and the training.

VOA: special.2010.06.22

It's gone down a path towards maturation that's very difficult to go back up.

它在分化成熟的道路上越走越远,覆水难收了

耶鲁公开课 - 生物医学工程探索课程节选

We'll loop back as we go through the class to questions about what's gone so horribly wrong, and more important, from a public health point of view, what can be done about it?

当所有的课都上完后我们会再回头看,到底是什么出了问题,更重要的是,从公共健康的角度来看,如何才能纠正这些错误呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选