The petroleum is first heated in a boiler to separate the smaller hydrocarbons with low boiling points from the larger hydrocarbons with high boiling points.
石油先在一蒸发器内加热，从高沸点的大分子碳水化合物中分离出低沸点的小分子碳水化合物。
So strong bonds means high melting points and boiling points.
因此，如此强的化学键意味着更高的熔点，和沸点。
These are huge energies, Coulombic forces, high melting points and boiling points.
这里有巨大的能量，库仑力，高熔点与高沸点。
Modern refining techniques produce solvents with a high degree of purity and stability in a wide range of grades and boiling points.
现代炼油技术可生产各种高纯度和高稳定性的溶剂，并有多种牌号及很宽的沸点范围。
Modern refining techniques produce solvents with a high degree of purity and stability in a wide range of grades and boiling points.
现代炼油技术可生产各种高纯度和高稳定性的溶剂，并有多种牌号及很宽的沸点范围。
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