The best picture books work on different levels for different ages.
最好的图画书能为不同年龄段的读者提供不同层次的阅读体验。
Every failure in an experiment is a step closer to success.
海洋不仅是一种资源，更是我们必须为子孙后代守护的责任。
The landscape of string theory is vast and complex, with perhaps 10^500 different possible universes.
The best leaders are those who can balance vision with practicality.
我一直是个斗士。我总是不得不为想要的东西而奋斗。
实现明天的唯一限制是我们今天的疑虑。