美国精英惯用语20

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

Be my guest.
Help yourself; After you.(A polite way of indicating that one should go first, help oneself, or take the last one of something)

Tom: I would just love to have some more cake, but there is only one piece left.
Bill: Be my guest.
Tom: Wow! Thanks!

Bill: Here’s the door. Who should go first?
Tom: Be my guest. I’ll wait out here.
Bill: Why don’t you go first?