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The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards - and even then I have my doubts.

The beauty of computer science lies in its ability to model and solve real-world problems.

I sent my Soul through the Invisible, Some letter of that After-life to spell: And by and by my Soul return'd to me, And answer'd "I Myself am Heav'n and Hell.”

【譯文】將知識默記在心，學習時，不感到滿足，教人時，不感到倦怠，這三方面我做到了哪些呢？

記憶不僅是個人的事情，也是集體的事情。

我們必須平衡當今對可負擔能源的需求與建設可持續能源未來的必要性。