How far has the plane traveled, then, in horizontal direction?

飞机飞行了多远？，在水平方向？

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The absorption or filtering out of color also works in a horizontal direction.

颜色的吸收或过滤也可在水平方向出现。

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Inhalation of the liquid along the axis, the horizontal direction of emission.

液体沿轴向吸入，水平方向排出。

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Car is traveling with some initial speed v0 in the horizontal direction.

车以 v0 的初速度沿水平方向开出

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So the pink line is going to move towards the vertical, and the blue line is going to move towards the horizontal, and notice that the amount of effort that we generate, goes down dramatically, goes down in this direction.

粉色的线最后会趋向垂直,蓝色的线最后会趋向水平,请大家注意下我们付出的努力,会朝这个方向大幅减少

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