我们必须平衡短期能源需求与长期环境目标。

The most important skill for a computer scientist is problem solving. The ability to formulate problems, think creatively about solutions, and express a solution clearly and accurately.

酸和碱不是绝对的，而是相对的。

The only way to learn mathematics is to do mathematics.

快乐的人不是处于某种特定环境的人，而是具有某种特定态度的人。