The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.
世界是一个危险的地方，不是因为那些作恶的人，而是因为那些旁观而不作为的人。
In computational complexity, we are not just dealing with the limits of what we can compute, but also with the limits of what we can prove.
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
Truth is often stranger than fiction.
出自《魏源集·都中吟十三首》。洋人的情况、技术和版图，我都了解得像万里大的手掌中玩米和沙子一样。知己知彼是兵家的策略，一定要知道谁主掌着典属国的职位。
水果产业要发展，必须从种植源头抓起，品质是生命线。
The past is never dead. It's not even past.