Translation of "Gestures" in Chinese

Gestures are very important in human communication.

在人类的交流活动中，身体语言非常重要。

Do people in America use these gestures?

人們在美國使用這些手勢嗎?

If the distance you move the pen is too small, the speed too slow, it can't recognize the gestures well and you can't operate it in the way you thought.

如果你移動筆的距離太小, 速度太慢, 它就無法辨識出你的手勢, 那麼你便無法用你想要的方式操作它。