你只会傻笑你只会发呆
[nĭ zhĭ huì shă xiào nĭ zhĭ huì fā dāi]
Translating to 'You just laugh foolishly, you only get lost in thought', it expresses how one behaves helplessly, probably referring to being in awe or affection towards someone or a situation which causes them to act mindlessly.