社交动向更新 social update 汰旧换新out with the old and in with the new (idiom) 推陈布新 to go beyond old ideas, advancing all the time ..
双语例句
1
她强调,每一年有不同的婚纱流行,随时提供新货,汰旧换新,对消费者才公平。
She emphasized that each year, there are different wedding fashions, and so she will provide new dresses and replace the old ones, in order to be fair to the consumers.