改变的秘诀在于集中你所有的精力,不是对抗旧的,而是建立新的。
成功不在于金钱,而在于热爱。
自然科学是一种通过描述自然来理解自然的尝试。
It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.