“先入观念”常见的英文表达是 “preconceived notion” 或 “preconceived idea”。
preconceived notion：强调在接触新事物或信息之前就已经形成的看法或观念，带有一定的主观性和先入为主的色彩。
preconceived idea：与“preconceived notion”意思相近，也指事先形成的想法或观念。
例如：
We should avoid making judgments based on preconceived notions.（我们应该避免基于先入为主的观念做出判断。）
Her preconceived ideas about the job made it difficult for her to adapt to the new environment.（她对这份工作的先入为主的想法让她很难适应新环境。）