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出自漢·桓寬《鹽鐵論·執務》。阜，土山。土積得多便會成山，水積得多便成江河。此以積土成山、積水成河為喻，說明積少成多、凡事要從一點一滴做起的道理。

我想像鳥兒歌唱一樣畫畫。

組合數學是不用計數的計數藝術。

I have to say to myself that some birds aren't very close. Their feathers are just too bright. When they fly away, you know it's a sin to lock them up, and you'll be inspired by them. Still, the place you live in is that much more drab and empty that they're gone. I think I really miss my friends.

Hold on, success at the next corner waiting for you.