理所當(dāng)然

理所當(dāng)然 (lǐsuǒdāngrán) 按道理應(yīng)該如此 justifiably; a matter of course; as it ought to be; be both natural and right; it goes without saying; it is what propriety requires 就把來結(jié)識(shí)了這位大哥,也是理所當(dāng)然。——明· 馮夢龍《醒世恒言》 成語解釋當(dāng)然：應(yīng)當(dāng)如此。按道理應(yīng)當(dāng)這樣。理所當(dāng)然出處隋·王通《文中子·魏相篇》：“非辯也，理當(dāng)然耳?！笔褂美渖普吒６鴲赫叩?，理所當(dāng)然。

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