We started with just the seven metals and carbon plus sulfur, it was the point of departure for Democritus.
我们开始讲了7种金属，还有碳和硫磺，那就是Democritus的起点。
2
The hydrocracking tail oil possesses the characteristics of higher viscosity index, pour point, viscosity and lower sulfur, nitrogen, impurity content.
加氢裂化尾油粘度指数高，低硫、低氮、杂质含量少，倾点和粘度偏高。
3
The characteristics of biodiesel is low content of sulfur and aroma hydrocarbon, high content of oxygen, high cetane value and flash point, less hazardous exhaust gas.