He skated the length of the rink without stopping.他一下子滑过了整个溜冰场.He skated a figure of 8 in the rink.他在溜冰场上溜了个8字形.He skated a figure of eight in the rink.他在溜冰场上溜了个八字形....
本节只讨论其中的两类: 金属离子钝化剂和过氧化物分解剂.Only two types will be included in present discussion: metal - ion deactivators and peroxide decomposers.向焦炭表面喷洒钝化剂溶液可以改善焦炭热态强度.The hot strength of coke can be improved by spraying passivator ...