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The gesture of thumbs up is often believed to originate in ancient Rome following gladiatorial combat when the fate of a defeated warrior was decided by spectators watching the event. They would gesture either with thumbs downturned - to mimic the stabbing motion of a dagger - to indicate the warrior be executed, or if the warrior had fought well, an upturned thumb - or thumbs up - would signify the warrior could be spared.



拇指朝上的這個動作可能源于古羅馬時代角斗士的武斗。那個時候的角斗士如果輸了，他的命運將由觀眾決定。觀眾做出拇指朝下的手勢，就像是一把匕首向下插的樣子，這就意味著角斗者會被處死。如果觀眾認為角斗者表現(xiàn)很好，做出拇指朝上的手勢，表示可以饒他一命。