怎样将我的椅背恢复到垂直的位置？

How do I bring my seat back to its full upright position?

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怎样将我的椅背回复到垂直的位置？

How to I bring my seat back to its full upright position?

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把座位靠背放到垂直的位置。

Put the back of your seat in an upright position.

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突然失去垂直的或笔直的位置。

To lose an upright or erect position suddenly.

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你必须不断地调整你的手的位置以保持对象的垂直。

You had to constantly adjust the position of your hand to keep the object upright.

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你必须不断地调整你的手的位置以保持对象的垂直。

You had to constantly adjust the position of your hand to keep the object upright.

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