He was very active and rode down several horses. 他劲头很大，一连骑了好几匹马。
Ni-based catalysts doped Ru and/or Sn were prepared by impregnation method,and their activity and stability in coupling methane partial oxidation and carbon dioxide reforming were observed. 利用浸渍法制备了钌和锡掺杂镍系催化剂,考察了其耦合甲烷部分氧化与二氧化碳重整的活性和稳定性。
STAINLESS STEEL.ALLOY STEEL AND CARBON STEEL. 不锈钢精密铸件。碳刚铸件。合金钢铸件。
Are activation and registration the same thing? 激活和注册是一样的吗?
Black, Salmon, Ceramic and Carbon Fiber. 黑色，鲑鱼，陶瓷和碳纤维。