I must study politics and war that my sons may have liberty to study mathematics and philosophy.
我必须研究政治和战争,以便我的儿子们可以自由地研究数学和哲学。
Innovation is the inexhaustible driving force for enterprise development.
过去是跟随我们的影子,但前方的光指引我们的脚步。
The past is a foreign country; they do things differently there.