学习数学的唯一方法就是做数学。
The destiny of a nation is determined by its people.
绿色开采、低碳利用是煤炭行业可持续发展的必由之路。
"To write is to remember, and to remember is to live twice."
最好的文学是让我们感到不安、扰乱我们睡眠的文学。
Those who cannot remember the past arecondemned to repeatit.