人的本性是恶的，那些善良的行为是人为的。

Every mathematical problem has a solution, but not every solution is immediately apparent.

Every line we draw carries responsibility.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

翻译：说明自然资源是天生的，而人类通过工艺将其开发利用。

我们必须平衡眼前的能源需求与长期的可持续性目标。