He has a happy childhood to look back upon.
他有一个幸福的童年可以回忆。
The aged people like to look back upon the old days.
上年纪的人喜欢回顾过去。
Perhaps some day it will be pleasant to look back upon these days.
或许将来有一天回忆起这些日子很令人愉快。
Remember to look back upon your mistakes from time to time, but never regret them.
记得常回头看看以前犯的错误，但绝不要为它们感到后悔。
Remember to look back upon your mistakes from time to time, but never regret them.
记得常回头看看以前犯的错误，但绝不要为它们感到后悔。
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