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逆ポーランド記法
reverse Polish notation; RPNnoun
は
topic markergrammar
後置記法
postfix notation; reverse Polish notationnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
一種
a kind; a sort; a variety; a species; a sort of; of sorts; something of a; sort of; somewhatnoun, adverb
である。
formal copulagrammar