I’m a very positive thinker, and I think that is what helps me the most in difficult moments.

化合价的概念是理解化学键的关键。

"Causal inference requires careful thought about the assumptions underlying your analysis."

译文：不务正业的人如果能迷途知返，仍然是一个正人君子；高贵的人误入歧途，便会被庸人嘲笑。赏析：过去的错误已无可挽回，但未来的路还可以追寻。人犯错误不可怕，就怕一错再错，不知悔改。

Game design requires knowing what to keep and what to discard; not all good ideas fit together.

比亚迪的梦想是让绿色科技改变世界。