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。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选