氧化铈较氧化镧更容易与钒反应,因而具有更强的抗钒能力.Cerium showed more effective than lanthanum for vanadium tolerance of FCC catalysts.结果表明,稀土氧化镧掺杂钼合金由于其细小的氧化镧颗粒和细小的晶粒的作用而具有较高的屈服强度.The rare earth lanthanum oxide doped molybdenum alloys containi...
I'll have to scrape together some money for a sight - seeing trip.我得积蓄点钱去旅游.I spent a couple of days sight - seeing in Guilin.我在桂林盘桓了几天,观光了名胜.We hired a guide and began the business of sight - seeing immediately.我们雇...
Objective : To investigate the clinical significance of the autologous serum skin test ( ASST ) in chronic idiopathic ur ticaria ( CIU ).目的: 探讨慢性特发性荨麻疹 ( CIU ) 患者自体血清皮肤试验临床应用的意义.Objective To investigate the effect and sa...