Students of human migration speak of "push" and "pull" factors, which influence an individual's decision to move from one place to another.

研究人类迁移的学生们谈到“推”和“拉”因素，这些因素会影响个体是否会从一个地方迁移到另一个地方。

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The main distinction made in models of interaction is between the pull model and the push model.

交互模型方面的主要区别是拉模型与推模型之间的区别。

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Not out of sloth, but because I find the results much the same no matter how long I roll and fold and push and pull.

并不是因为我懒惰，而是因为我发现无论我卷，折，推，拉多长时间，结果都是一样。

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Fierstein, also represented on Broadway right now with the book for "Newsies, " spins his typical theatrical magic, teasing out from the movie both a love triangle and the pull-push of fathers and sons.

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But for many men, the most difficult part of P90X isn't its heavy emphasis on pull-ups and push-ups, but rather its relentless call for stretching and warming up.

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And that's why the endeavor required a pair of 600-horsepower push-and-pull trucks, along with dozens of workers leading and following to displace and restore countless traffic lights, utility poles and the occasional pesky palm tree to make way for the shiny red caravan.

WSJ: Levitated Mass | Arrival of a Rock Start | By Arnie Cooper