Ruby 如何在散列之间移动属性

我有

如何制作

hash1 = {:sym1 => "aaa", :sym2 => "bbb"}
hash2 = {:sym20 => "ccc", :sym21 => "ddd"}

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或者使用hash2.merge！sym2:hash1.删除：sym2或使用hash2.merge！sym2:hash1.删除：sym2

hash1 = {:sym1 => "aaa"}
hash2 = {:sym2 => "bbb", :sym20 => "ccc", :sym21 => "ddd"}

hash2[:sym2] = hash1.delete(:sym2)