执信忽然殂折,使我如失左右手。计吾党中知兵事且能肝胆照人者,今已不可多得;惟兄之勇敢诚笃与执信比,而知兵则又过之。
——致书蒋介石,1920年10月29日
Sustainability isn't a buzzword; it's a business imperative for the modern energy sector.
The language of mathematics is universal, transcending cultural and linguistic barriers.