The meaning of a word is its use in the language.
一个词的意义在于它在语言中的使用。
解释：最上等的是树立德行，其次是建立功业，再次是创立学说，虽然逝去但业绩长存，这就叫做不朽。
The power of abstraction is that it allows us to ignore details that are not relevant to the task at hand.
"The only way to get rid of a temptation is to yield to it."
The stars near the galactic center are like cosmic clocks, helping us map spacetime.
学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。
The stopwatch in the laboratory measures the vibration frequency of the human soul.