翻译：既了解敌人，又了解自己，每次作战都不会有危险。

The most significant threat to liberal democracy today is not from rival ideologies like communism or fascism, but from within—from the rise of populism and the erosion of democratic norms.

我不相信写作障碍，我只相信写作懒惰。

人工智能的未来在于理解大脑是如何工作的。