natural material 的译意!natural material是什么?

natural material 的译意!natural material是什么? natural的名词是什么? natural的比较级是什么 material的意思 natural natural natural natural natural natural natural stuffing material is natural 90% down 10% waterfowl 90%duvet 10%autres plumes是什么意思 Material material 金刚石是最硬的材料,粗糙的金刚石怎样打磨成精致的钻石?diamond is the hardest known natural material,how are rough diamonds shaped or cut to form the gem shapes. 综合67.Many countries are increasing their use of natural gas,wind and other forms of （ ）（energy / source / power / material）讲一下这四个词的用法区别.和本题答案. 英语自然能源用哪个?energy?force?power?material?先挑一个有更好的麻烦教下是单选,所以麻烦挑一个Many countries are increasing their use of natural gas,wind and other forms of ___. natural display的计算器是什么意思?