It is now clear that the hybrids form seeds which have the one or the other of the two differentiating characters.

The key to artificial intelligence is the representation of knowledge.

Sustainability isn't an option; it's a responsibility we owe to future generations.

释义：能够忍耐最难忍受的困苦，最终必能苦尽甘来。

当我们仅用板英尺来衡量森林的成功时，我们就只见树木不见森林了。