抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。

The most formidable weapon against errors of every kind is reason.

The world is so unpredictable. Things happen suddenly, unexpectedly. We want to feel we are in control of our own existence. In some ways we are, in some ways we're not.

"To be born poor is an accident, but to die poor is a choice."

"In the quantum realm, the observer is not just a passive spectator but an active participant in the unfolding of reality."

无人机的未来是开放和共享的。