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數學中最重要的是理解概念，而不僅僅是記憶公式。

"If you’re feeling lost, just look inside yourself."

"The writer is a man who is always searching for the right word, the perfect word, the word that will make the reader see what he sees, feel what he feels, understand what he understands."

投資可再生能源和更清潔的技術是我們對可持續未來承諾的一部分。