Sustainability isn't an option; it's a responsibility.

Free vaccines are more valuable than expensive treatments, yet harder to promote.

只要心意不放纵，就不会出现差错；只要用心不怠惰疏忽，就没有不能坚守的、随意放纵的志向。

编程语言中最重要的东西是语义，而不是语法。

The financial markets generally are unpredictable. So that one has to have different scenarios... The idea that you can actually predict what's going to happen contradicts my way of looking at the market.