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隔岸觀火 隔著河看人家著火。比喻對(duì)別人的危難不去求助，在一旁看熱鬧。
嘴唇?jīng)]有了，牙齒就會(huì)感到寒冷。比喻利害密要相關(guān)。
[mutual dependency of neighboring countries when confronted with a powerful and aggressive enemy;share a common lot] 唇?jīng)]有了,牙齒就寒冷。比喻雙方休戚相關(guān),榮辱與共
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