n+al变adj
nature natural emotion emotional
nation national
education educational
introduction introductional
nation national
education educational
introduction introductional
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第1个回答 2013-04-20
calture ———caltural
agriculture——agricultural
electric——electrical
agriculture——agricultural
electric——electrical
第2个回答 2013-04-20
nature natural emotion emotional
第3个回答 2013-04-19
magic-magical logic-logical