相关单词近義詞 spring 春天, fountain 噴泉, outpouring 流露, outflow 流出臨近詞natural ice, natural, natural thymocytotoxic autoantibody, Natural Language Principles in Perl, natural language generation program, natural electric field distribution, natural semantic metalanguage theory, naturalized English as mother tongue, natural self-purification capacity, Natural Smoky Quartz Crystal Cluster, Natural Resources Industrial Cluster, natural gas steam reforming catalyst 返回 natural spring