学习数学的最好方法就是做数学。
The best way to learn mathematics is to do mathematics.
The past, like the future, is indefinite and exists only as a spectrum of possibilities.
Energy security is a crucial guarantee for national development. We must intensify technological innovation to enhance the efficiency of oil and gas exploration and production.
人们不应该研究这样的问题，应该把它们留给哲学家。
Food security is the cornerstone of national security, we must firmly grasp it in our own hands.
科学的进步不是一条直线，而是一系列曲折，有时在新的进展之前似乎会倒退。