他在公共场合故意冷落她，让她觉得自己像是一个白痴。

He snubbed her in public and made her feel an idiot.

《柯林斯英汉双解大词典》

读者，假设你是一个白痴。再假设你是一名国会成员。不过我的话说重复了。

Reader, suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself.

youdao

一声“大声叹息”意味着她认为那一刻的你是一个白痴，而且不明白自己为什么浪费了这么多时间站在这里来跟你争论“无关紧要的事”。

A "loud sigh" means she thinks you are an idiot at that moment, and wonders why she is wasting her time standing here arguing with you over "Nothing".

youdao