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...
He nodded mechanically, his eyes fixed on the girl.他机械地点点头,眼睛直勾勾地盯着那个姑娘。The air was circulated mechanically.空气循环是靠机械驱动的。The car was mechanically sound, he decided.他断定,这辆车的机械性能非常可靠。...
...competing parties clamouring for the attention of the voter...互相竞争的政党吵闹着争取选民的注意A voter must necessarily be no younger than eighteen.选民必须在18岁以上.The outcome of tomorrow's elections will be studied carefully as a si...