A : Don't tell anyone that I won the lottery. This is just between you and me.

     아무에게도 내가 복권에 당첨되었다고 말하지마. 너와 나만 알고 있자.

B : Of course. My lips are sealed. By the way, why do you want to keep it secret?

      물론이지. 비밀을 지킬게. 그나저나，왜 그걸 비밀로 하고 싶어 하는 거야?

A : I will tell you about it later.

      나중에 얘기해줄게.