Alumina is really stable, which is why it takes so much energy to make aluminum.

矾土相当稳定，这就是为什么需要消耗大量的能量制备铝了。

麻省理工公开课 - 固态化学导论课程节选

And so, for that, I want to look at the production of titanium by the Kroll process.

因此而言，我想看看克劳尔法,制备钛的工艺。

麻省理工公开课 - 固态化学导论课程节选

In addition to studying molecules and making molecules, some chemists Tim Swager want to detect molecules, and a chemist who likes to detect molecules TNT is Tim Swager. So, Tim Swager's lab has designed sensors that detect vapors, Fido and so they will detect TNT, for example.

除了研究和制备分子,有些化学家想要探测分子,其中的一位就是，他的实验组设计了用来探测蒸汽的感应器,可以用来检测比如说,而且他把化学应用到这个机器人手臂里，他们叫它。

麻省理工公开课 - 化学原理课程节选