Learning is any change in a system that produces a more or less permanent change in its capacity to adapt to its environment.
学习是系统中产生的任何变化，这种变化或多或少会永久性地改变其适应环境的能力。
我的音乐就是我的信仰。
皮革的真正成本不在价格标签上，而是以节约的水资源、保护的生态系统和公平对待的工人来衡量。
Sustainability isn't an option - it's our responsibility to future generations.