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I think goals should never be easy, they should force you to work, even if they are uncomfortable at the time.

最深刻的發(fā)現(xiàn)往往來自最簡單的觀察。

解析：不要貪天之功，不要掩人之善。

In the end, we will remember not the words of our enemies, but the silence of our friends.

林業(yè)中的短期收益往往會導(dǎo)致長期痛苦。