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◎吐故納新tǔgù-nàxīn
(1)[exhalling the old and inhalling the new;get rid of the stale and take in the fresh]∶廢棄舊的，吸收新的
(2)[breathe]∶人體的呼吸過(guò)程，謂呼出二氧化碳，吸進(jìn)新鮮空氣。比喻揚棄陳舊的、無(wú)用的，吸收新鮮的、有用的
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