In April,the company changed its licensing agreement with producers of applications for Apple mobile devices.

VOA: special.2010.06.22

Does it strike you odd that maybe magnesium oxide, one of its applications would be refractories?

因此我们就会发现，氧化铝一个很重要的应用，就是耐火砖？

麻省理工公开课 - 固态化学导论课程节选