Reinforcement is the central factor in the acquisition of new behavior patterns.
Every ton of coal extracted should carry the weight of our commitment to the future.
对付一个不自由的世界的唯一方法,就是变得如此绝对自由,以至于你的存在本身就是一种反抗。
Collaboration across borders isn’t optional—it’s essential for global aquaculture.
The fact is that women have more freedom and opportunity in America today than ever before.