In algebra, the equality of two quantities is expressed by an equation.
在代數(shù)中，兩個(gè)量的相等性通過(guò)方程來(lái)表達(dá)。
一本好書(shū)的衡量標(biāo)準(zhǔn)是它是否讓你思考、感受并以不同的方式看待世界。
人們忘了告訴對(duì)方彼此的變化。
The most durable thing in writing is style, and style is the most valuable investment a writer can make with his time.
計(jì)算的本質(zhì)不僅在于符號(hào)的操作，更在于對(duì)這些操作所代表意義的深刻理解。