Freedom is not a gift but an achievement that must be won every day.
自由不是礼物,而是必须每天争取的成就。
我们的教学方法只有一个,就是必须维持孩子们的高度兴趣和强烈持续的注意力。
The concept of purpose has no place in a scientific account of behavior.
The bond market is the ultimate indicator of market expectations.
One day in perfect health is far better than an eternity in any other state.