The main culprit, LDL (for low-density lipoprotein), is the body's oil truck, circulating in the blood, delivering fat and cholesterol to the cells.
主要的“罪犯”是低密度脂蛋白胆固醇，它是身体的运油车，在血液里向细胞传输脂肪和胆固醇。
2
With an eye on the oily sludge in Chinese oil fields, a kind of differential densitycirculating fluidized bed combustion technology for treating oily sludge is proposed.
针对我国油田的油污泥情况，提出一种采用异密度循环流化床燃烧技术处理油污泥的方法。
3
A small volume of fluid, often of a higher density than the main body of fluid, within the circulating or production-fluid system that influences the flow or production characteristics of the well.