蒙古国的年轻人，尤其是在农村地区，有一种传统的问候方式：伸出手臂，手掌向上，抓住年长的人的肘的前部。年长的人也做同样的姿势，唯一不同是手掌向下。

A traditional method of greeting, especially in the country side, is for the younger person to hold their arms out, palm up, and grasp the older person just in front of the elbow.

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这一动作是在器械出手时给与它以最大速度构成的。这涉及到由起始姿势开始给以加速度的问题。

The act of throwing consists of giving the maximum speed to the missile at the moment when it leaves the hand. The involves acceleration from a resting position.

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