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。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
The only time success comes before work is in the dictionary.
质量不是标签;它是一种标准。
The future of energy lies in balancing today’s needs with tomorrow’s responsibilities.