可持续经济增长的关键在于全要素生产率的持续提升。
物理学中的每一个发现都打开了一扇通向新奥秘的门,这就是科学的美丽之处。
Data is not the answer, but the beginning of the question.
I don't sing because I'm happy; I'm happy because I sing.
People change and forget to tell each other.