adj.专横的，放肆的，冒昧的，自负的

He made presumptuous assumptions about the company's financial situation without having all the facts.
他没有全部事实就对公司的财务状况做出了妄自尊大的假设。
It's presumptuous of you to think you can tell me what to do.
你真以为自己有权告诉我该怎么做，这是不妥当的。
She showed a certain amount of presumptuousness in assuming the lead role without proper experience.
她在没有任何经验的情况下就自以为是地担当主角，显得有些傲慢。
Don't be so presumptuous as to believe everyone will agree with your opinion.
不要过于自以为是，认为所有人都会同意你的观点。
His presumptuous behavior at the party left a bad impression on the guests.
他在聚会上的傲慢举止给客人们留下了不好的印象。
The manager frowned at the employee's presumptuous request for a promotion without any performance improvements.
经理对那位员工未经提升就提出晋升的要求感到不满。
The newcomer's presumptuous assumption that he knew everything was quickly dismissed by the seasoned professionals.
新来者自以为无所不知的假设很快被资深专业人士驳斥了。
It's presumptuous to assume that just because you're wealthy, you have all the answers.
假定因为富有就拥有所有答案，这种想法是傲慢的。
Her presumptuousness in questioning the doctor's diagnosis earned her a stern look from the medical staff.
她质疑医生诊断的傲慢态度引起了医护人员严厉的目光。
The child's presumptuousness in wanting to join the adults' conversation was politely redirected by his parents.
孩子想加入大人谈话的自以为是被父母温和地引导到一边。