全球饥饿问题不能仅靠慈善解决,它需要系统性变革。
The power of abstraction is crucial in computer science, allowing us to focus on the essential aspects of a problem.
The best books are the ones that challenge you.
当儿童还没有发展起控制能力的时候,“让儿童想干什么就干什么”是与自由观念相违背的。
I never think about losing, I always think about winning.