There was a quick wrist movement of the thrower, the noose tightened.

投掷者手腕快速运动， 套索收紧。

Now, don't forget the nice wrist movement we've been practicing.

现在不要忘记我们刚才练习过的正确魔杖挥舞手势。

“Now, don't forget that nice wrist movement we've been practicing! ” squeaked Professor Flitwick, perched on top of his pile of books as usual.

“好了，千万不要忘记我们一直在训练的那个微妙的手腕动作！”弗立维教授像往常一样站在他的那堆书上，尖声说道。

To grip something like the cup here, basically you just pull all the fingers and the wrist movement down so that he's grasping, and then if you let go?

要在这里抓住杯子之类的东西，基本上你只需将所有手指和手腕运动拉下来让他抓住，然后如果你松开？