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 My mother had a great deal of trouble with me, but I think she enjoyed it. 

 There's no point in being grown up if you can't be childish sometimes. 

 For something,we can't understand when we are young but by the time we understand,we are no longer young. 有些事情，当我们年轻的时候无法懂得，当我们懂得的时候已不再年轻。

 When people talk, listen completely. Most people never listen.