bbc每日地道英语短语：由bbc英语编写,讲解口语中最常用的英语成语短语。
今日短语
短语 to give something the thumbs up 竖起大拇指，意思就是赞成同意这件事情。
例句
daisy's cake was delicious – i'd definitely give it the thumbs up.
wait until i give the thumbs up before you send that email to head office.
the boss just gave me the thumbs up to take three days off next week.
请注意
另一个短语 to thumb through something 意思是 随意浏览翻阅杂志书刊。
今日小常识
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.
拇指朝上的这个动作可能源于古罗马时代角斗士的武斗。那个时候的角斗士如果输了，他的命运将由观众决定。观众做出拇指朝下的手势，就像是一把匕首向下插的样子，这就意味着角斗者会被处死。如果观众认为角斗者表现很好，做出拇指朝上的手势，表示可以饶他一命