T : What's the direction of their rotation?

这四位同学的转动方向是什么你们注意到了吗？

youdao

One thing you may notice when particles collide with objects is that their rotation doesn't change after a collision.

有件事情首先必须注意，当粒子和物体发生碰撞的时候，粒子旋转通常不发生改变。

youdao

Liquid crystals were chosen because their strong birefringence provides a simple way to observe their rotation around the laser beam axis.

选择液晶是因为它们强烈的双折射提供了一种简单的方法去观察它们绕着激光光轴的旋转。

youdao

After a late-spring injury to Jeff Karstens and the release of Jonathan Sanchez, the Pirates needed the help in their rotation.

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The Mets have an open spot in their rotation because of the absence of Johan Santana and Hefner will likely fill it.

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Because of an off-day and the All-Star break, the Yankees finagled their rotation to ensure that Sabathia would miss just two scheduled starts.

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