Iron, nickel, copper, silver, gold, iridium , or ruthenium may be included as cocatalyst metals.铁 、 镍 、 铜, 银 、 金, 铱或钌,可用作复合催化剂金属.Using the same approach, iridium is alloyed with rhodium.使用同样方法, 铱被熔合与铑.Before the collisio...
She made a fanning motion, pretending to cool herself off.她做了个扇风的动作，假装想让自己凉快一点。She buried her head under the covers, pretending to be asleep.她把头埋到被子底下，假装睡着了。He stared sullenly into space, pretending not to hear the jeers...