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加油,物理这东西对于大多数人来说还是困难的~
Ps:我们班的物理课代表说,物理这东西,悟(物)着悟(物)着你就理了.....
So the most distant way in the world is the love
between the bird and fish.One is flying at the sky,the other is looking upon into the sea.

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