• 天然的路线

natural end自然目的naturaladj.自然的；天然的；私生的natural disturbance自然干扰natural ventilaiton自然通风natural plant juice天然植物液natural gas network天然气管网natural growth rate自然增长率Natural scene image自然场景图像natural gas vehicle天然气汽车Natural in economics经济学本质natural ox gallstone天然牛黄natural growth value自然增长值