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今翟上无君上之事,下无耕农之难,吾安敢废此
墨翟我上没有侍奉国君的差事,下没有耕田种地的艰难,我怎么敢放弃读书呢? 
The collaboration between theory and experiment is essential for the advancement of physics.
I guess it comes down to a simple choice:get busy living or get busy dying.
Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.