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Positive psychology is not a spectator sport.

The function of freedom is to free someone else.

能源的未來是多樣化的，沒有任何單一來源會占主導地位。

Innovation in coal mining isn't about reinventing the wheel, but about making the wheel more efficient and environmentally friendly.

合作是林業進步的根源——沒有任何一個實體能獨自解決這些挑戰。

Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.

可憐的是那些快樂取決于他人許可的人。