eternal truths will be neither true nor eternal unless they have fresh meaning for every new social situation . (franklin roosevelt , american president )
e永恒的真理如果不在新的社会形势下赋予新的意义,要么就不是真理,要么就不是永恒的。 (美国总统 罗斯福 . f.)
histories make men wise poems witty; the mathematics subtle; natural philosophy deep moral grave logic and rhetoric able to contend .
(francis bacon , british philosopher )
历史使人明智；诗词使人灵秀；数学使人周密；自然哲学使人深刻；伦理使人庄重；逻辑修辞学使人善辨。( 英国哲学家 培根. f.)
if you don’t learn to think when you are young , you may never learn .(thomas edison , american inventor )
如果你年轻时就没有学会思考，那么就永远学不会思考。(美国发明家 爱迪生 . t.)
natural abilities are like natural plants that need pruning by study.
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