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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A stable, reliable push-pull pulsed wire feeder and its working Principle are introduced. Effective factors of wire-feed stability is also analyzed in this paper.

本文介绍了一种送丝性能稳定、可靠的推拉脉动送丝机及其工作原理，分析了送丝稳定性的影响因素。

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The results of implication matrices and hierarchical value maps indicated the existence of 8 pull motivational factors and 17 push motivational factors.

涵义矩阵（implication matrix）和等级价值图形（hierarchical value map）显示，共有8个拉力动机因素和17个推力动机因素。

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