胆固醇是血液中的一部分，当血液开始粘附在血管壁上时，胆固醇也开始附着在血管壁上(怎么会没有'低密度脂蛋白血液'和'高密度脂蛋白血液'之分呢？)
Cholesterol is a part of blood and when blood starts sticking to the vascular walls so does the cholesterol in the blood (how come there's no 'LDL blood' and 'HDL blood'?)
利用振动剪切挤出装置研究了线性低密度聚乙烯(LLDPE)在振动与旋转剪切复合力场中挤出成型时的流变行为。
The new extrusion equipment has been designed to research the rheological behavior of LLDPE extrusion moulding in complex stress filed of vibration and shearing.
应用毛细管流变仪测量了在接近实际挤出工艺条件下低密度聚乙烯熔体的流变性质； 应用流动可视化技术，观测了试样熔体流经突然收缩的轴对称口模时的入口收敛流型。
The entry convergent flow pattern was observed with flow visualization technique when the resin melt flowed through a die featuring abrupt contraction in cross-section of channel and axial symmetry.
壳程流体在较低的雷诺数时就可获得湍流流动，因此，壳程适合低密度流体。
Turbulent flow is obtained at lower Reynolds Numbers on the shell side, so that the fluid with the lower mass flow preferably goes on that side.
壳程流体在较低的雷诺数时就可获得湍流流动，因此，壳程适合低密度流体。
Turbulent flow is obtained at lower Reynolds Numbers on the shell side, so that the fluid with the lower mass flow preferably goes on that side.
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