这就是所谓的催化裂化.It is known as catalytic cracking.裂化是使较重的低挥发性的碳氢化合物分裂成较小分子的化学分裂.Cracking involves the chemical breakdown of higher, less volatile hydrocarbons into smaller molecules.FCC(流化催化裂化 ) 是炼厂生产汽油的主要方法之一.The Fluid Catal...
The presence of angina indicates significant coronary ischemia.心绞痛本身说明有明显的冠状动脉供血不足.Their excellent survival during autolysis in vitro and ischemia in vivo is consistent with this.与此一致是,在体外自溶时和在体内局部贫血时,它们出色地幸存下来.Leptin im...
California dogtooth violet with creamy white flowers sometimes yellow - tinged.加利福尼亚州的一种赤莲,花乳白色,有时淡黄色.North American dogtooth having solitary white flowers with yellow centers and blue - or pink - tinted exteriors.北美的一种赤...