“先入为主”这个成语在英语中可以翻译为 “preconceived notions”。这个短语指的是在了解或评估某事物之前，就已经形成的固定观念或偏见。

1. Preconceived Notions

– Explanation: This phrase refers to ideas or opinions that are formed before someone has had any real experience or knowledge about a subject. Preconceived notions can be based on stereotypes, past experiences, or hearsay, and they can often lead to misunderstandings or unfair judgments.

2. Bias

– Explanation: Bias is a tendency to favor or disfavor a particular person, group, or thing. It can be conscious or unconscious and can result from personal experiences, cultural background, or societal influences. Bias can lead to preconceived notions and can hinder objective thinking and decision-making.

3. First Impressions

– Explanation: First impressions are the initial judgments or opinions that people form about someone or something based on their first encounter. These impressions can be influenced by preconceived notions and can sometimes be difficult to change, even with further information or experience.

In summary, “preconceived notions” is the English equivalent of the Chinese idiom “先入为主,” and it is closely related to the concepts of “bias” and “first impressions.” These phrases highlight the impact of pre-existing beliefs and perceptions on how we interact with and understand the world around us.