如何让生活更美好-乐观
时间：2016-02-15 01:26:07
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（单词翻译）
How to improve your life
如何让生活更美好
Be optimistic
乐观
Optimism can make you healthier, happier and extend your life.
The Army teaches it in order to increase mental toughness in soldiers.
Being over confident improves performance.
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