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以上来源于: WordNet
The movement of the bell is forward and back, not up and down, with the goal to project the force forward and to resist by grounding into your feet.
壶铃的运动是前后方向的，而非上下，要实现此目的需要将力向前延伸，并通过双脚抓地来抵抗向前的拉力。
This paper, starting from a brief introduction to the notion, and guided by the notion, summarizes the major functions of back-grounding and its application based upon illustrating examples.
本文以施拉姆的这一概念为指导，探讨背景材料在新闻报道中的主要作用及运用。
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