The challenge is to express the most with the least.
Every technological breakthrough is a challenge to the limits.
文学的力量在于它使我们感到不那么孤独。
We want to make sure Chinese babies can drink world-class milk powder.
The future of forestry lies in sustainable practices that balance economic growth with environmental stewardship.
可持续性不仅仅是关于材料，而是关于维持人们的生活和尊严。
The ratio of positive to negative emotions that predicts flourishing is about 3 to 1. Above that ratio, people tend to flourish; below it, they tend to languish.