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。

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A six-way power seat includes up, down, forward, back, tilt forward, and tilt rearward seat movement.

一个六向的电动座椅可以向上、下、前、后、前倾和后倾六个方向移动。

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Repeat this up-down movement on the left side 10 times, or until your waist or back muscles begin to tire.

重复这个起来、放下、向左的动作10次，或者直到你的腰部或背部肌肉开始觉着累了。

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For some, Dafydd Elis-Thomas AM for one, here was a sign of Plaid slipping back in to the role of national campaigning movement, rather than "grown-up constitutional political party".

BBC: Plaid Cymru conference: TV megastars and TV licences

The configurations are created by the four-way movements of the gantry (left, right, front and back) and the up and down movement of the platform.

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