美国精英惯用语

要做到一开口就让美国精英认为你是他们的朋友，你必须会说他们的语言，也就是……美国精英习惯用语

Act your age：Behave more maturely（A rebuke for someone who is acting childish. Often said to a child who is acting like an even younger child.）

l Johnny was squirming（动来动去） around and pinching（拧） his sister. His mother finally said,” Johnny, act your age!”

l Child: Aw, come on! Let me see your book!
Mary: Be quiet and act your age. Don’t be such a baby.