相对于目前飞行方向的侧滚动作。

A roll as compared to the current direction of flight.

youdao

你可以躺在滚筒上不动(这样可以使你的胸腔向两侧打开)，也可以慢慢地滚动，按摩脊柱两侧的肌肉。

You can either relax on the roller without moving (which opens your chest laterally) or roll gently from side to side to massage the muscles along your spine.

youdao

然后文字开始滚动直到到达另一侧，之后改变方向，再滚回它的起始位置。

The text then scrolls until it reaches the other end, whereupon it reverses direction and scrolls back to its starting point.

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