Definition
This phrase is used to imitate the sound of someone knocking on a door. It's often used as the opening line of a joke.
敲门声；有时作为笑话的开场白。
"Knock, knock!" "Who's there?" "Opportunity!" "I don't know, I've never heard it knock."
"咚咚咚！" "谁啊？" "机会！" "我不知道，我从没听过它敲门。"
"Knock, knock!" "Who's there?" "Art!" "Art who?" "Art you glad I didn't say 'banana'?"
"咚咚咚！" "谁啊？" "艺术！" "艺术谁？" "艺术你高兴我没说『香蕉』吗？"
"Knock, knock!" "Who's there?" "Ava!" "Ava who?" "Ava great day!"
"咚咚咚！" "谁啊？" "艾娃！" "艾娃谁？" "艾娃美好的一天！"