可持续发展不是一种选择，而是我们对后代的责任。
The most durable thing in writing is style, and style is the most valuable investment a writer can make with his time.
Psychology as the behaviorist views it is a purely objective experimental branch of natural science.
行为主义者眼中的心理学是自然科学的一个纯粹客观的实验分支。
成功来自于坚持和努力。
我不能没有书。