这位CEO的狂妄自大让他投入数十亿资金建造一座毫无商业价值的太空酒店。

The CEO's ___megalomania drove him to invest billions in building a space hotel with zero commercial value.

他不断谈论要收购所有竞争对手公司，这明显表现出狂妄自大的倾向。

His constant talk about buying out all rival companies shows clear signs of ___megalomania.