1)nature node,自然节点2)naturalistic syllable,自然音节3)natural link,自然环节4)free syllable,音节自然5)NFP(natural family planning),自然节育6)Nature fire,自然点火
用法例句
Hu Shi s modern poetics was established approximately during the period of "May Fourth Movement",and its essential idea is "the Great Liberation of Poetic Forms",with another two propositions of "Colloquialism arms" and "naturalistic syllables" as the complement.