natural ice天然冰naturaladj.自然的；天然的；私生的Natural Magnetism - Acting Ability自然的表演能力natural industrial blossom-decline产业自然兴衰natural and geographical environment自然地理环境natural and regenerated silk fibroin天然和再生丝素纤维natural conservation at county level县级自然保护区natural thymocyte poisonous antibody天然胸腺细胞毒性抗体Natural predator sub-commu- nity天敌亚群落natural marine intermediate deposits天然沉积海相土natural combustion of remaining coal遗煤自然发火Natural colors like natural teeth.色泽栩栩如生,酷似天然牙齿。