echo chamber

noun
🔊/ˈekəʊ tʃeɪmbə(r)/
🔊/ˈekəʊ tʃeɪmbər/
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  1. an environment in which somebody encounters only opinions and beliefs similar to their own, and does not have to consider alternatives
    • It can be too easy to slip into an echo chamber that reinforces extreme political views.溜进强化极端政治观点的回声室可能太容易了。