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An act of goodness is of itself an act of happiness.
The study of mathematics is a constant dialogue between the concrete and the abstract.
出自汉·桓宽《盐铁论·力耕》。非,不是。宝,这句话指好的办法。道,途径、方法。治家并不是只有一种有效的方法,治国并不是只有一条可行的途径。这句话言治家与治国一样,都有许多不同的方法,当事人应当努力寻求,不必因循守旧而无所作为。
The stream of thought flows toward purposeful ends.
The gritty individual approaches achievement as a marathon; his or her advantage is stamina.
永远不要停止学习,因为生活永远不会停止教导。