No worries there. We just have to close in with the camera and rotate it.

不用担心这里。我们只需将它拉近摄像机，并旋转就可以了。

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Then I will rotate it by 180 degrees.

那就相当于一次旋转了180度。

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If you rotate it, you won't know.

如果它转动了,你也不知道

耶鲁公开课 - 基础物理课程节选

Pulling this lever or pushing the button would actually rotate the paper enough so that you'd be on a new line and it would also move the little imprinting head that prints the letters of the alphabet and such all the way to the left.

拉杆或按下按钮会让纸翻一下,这样你就能在新的一行上打字了,同时移动打印字母的,压印头,这样也能移到最左边。

哈佛公开课 - 计算机科学课程节选

So really, you can not ever rotate a double bond, it makes your molecule very rigid.

实际上，你不能转动一个双键，它使得你的分子很坚固。

麻省理工公开课 - 化学原理课程节选

At first you wonder why, and then it is explained that the telescope must swivel as it tracks objects on the sky, and that means the instrument has also to rotate if it wants to keep a lock on those same galaxies.

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We mostly like the strap design, but because it's able to rotate when locked into position, it's very easy to end up with a bunch of tangles.

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The headband is adjustable and the earcups rotate inward, making it easy to wear them around your neck.

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