The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little.
未逾四十八岁的悲观主义
，是知道得太多之人；而年逾四十八岁的乐观主义，是知道得太少之人。
词;
嫉俗的;
;
;
;的;The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little.
未逾四十八岁的悲观主义，是知道得太多之人；而年逾四十八岁的乐观主义，是知道得太少之人。
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