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可持續發展不僅僅是保護樹木；它關乎確保自然和人類共同繁榮的未來。

When we talk about food security, we're really talking about national security.

啊，但一個人的追求應該超越他的能力，否則天堂還有什么意義？

"Sometimes you have to lie. But to yourself you must always tell the truth."

The psychologist must avoid all forms of mental chemistry.