And how we figure that out and how we move in a direction that's both effective and affordable is the work that has to be done over the next two years."

VOA: standard.2010.03.26

It could be the response is 'there's something dangerous in the environment, we got to move away', and so the response is for the cell to crawl in the opposite direction.

这个信号还有可能是,"外面很危险,我们得赶紧跑",于是细胞就向相反方向游走了

耶鲁公开课 - 生物医学工程探索课程节选

'We'll talk about all the issues that need to be addressed as long as there's mutual respect and a recognition of the sovereignty of both countries.' And,I think that if we would move in that direction, based on those principles, we'd see some great things happen."

VOA: standard.2009.04.07