握手是上古石器时代穴居人留下的一种遗俗。当时，人们在战争或狩猎时，手中常常握有石块和棍棒等武器，用以防身。陌生人相遇，倘若大家都无恶意，彼此就要把手中的东西放下，将手臂伸向空中，或伸开手掌，让对方摸摸掌心，以示没有携带任何武器。后来，渐渐演变为两手相... Shaking hands is a legacy left by the Neolithic cavemen. At the time, people often held arms, such as stones and sticks, in their hands during the war or hunting to defend themselves. If strangers meet each other, if they are not malicious, let each other put down their hands, put their arms in the air or extend their palms, touching each other’s palm to show that they are not carrying any weapons. Later, gradually evolved into two hands ...