煤炭不仅仅是一种商品，它是对美国未来的承诺。
Coal is not just a commodity, it's a commitment to America's future.
Boys, you must strive to find your own voice. Because the longer you wait to begin, the less likely you are to find it at all. Thoreau said, "Most men lead lives of quiet desperation." Don't be resigned to that. Break out.
好的研究关键不仅在于方法，还在于问题的清晰性和数据的质量。
我们生活在一个叙事复杂的时代，我们讲述的故事和我们过的生活一样复杂。
To live is to leave traces, and poetry is the most enduring of them all.