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关起门来造车子。比喻脱离实际，只凭主观办事。
[make a cart behind closed doors;divorce oneself from reality and act blindlly] 原指按同一规格,关起门来造车。用起来也很合辙。后反其意而用之,比喻自作主张,不合实际 脱离实际,闭门造车,是创作不出好作品的
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