Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions.

有些运动主要涉及整体的垂直或水平运动，其中转动可以忽略，可以用三维线性运动的简单方程来研究。

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Vertical or horizontal?

垂直还是水平？

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A box sizer can be vertical or horizontal.

一个方框sizer可以是垂直的也可以是水平的。

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Then we picked the size and vertical or horizontal orientation.

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Such a strategy is not so much vertical or horizontal integration, but a wheel, with the brand at the hub and each of the spokes a means of exploiting it.

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It measures force to determine 3-dimensional position, such as deep, shallow, horizontal or vertical, and adapts the pool cleaner for maximum cleaning action.

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