natural bow静挠度, 自然挠度naturaladj.自然的；天然的；私生的Natural Ferfect Quartz Crystal Cluster完整水晶晶簇标本natural forest protection program area天保工程区Natural Environmental Conservation Act自然环境保护法natural killer cell stimulatory factorNKSFnatural language interface to database数据库自然语言接口natural regeneration under shelterwood上方天然下种更新法Natural pearls or cultured pearls?Natural Value and Environmental Ethics自然价值与环境伦理natural sausage casing binding machine天然肠衣结扎机natural anti-thymocytotoxic antibody天然抗胸腺细胞毒性抗体(免)