化学是物质的科学,但我更愿意将其视为变化的科学。
It is sadder to find the past again and find it inadequate to the present than it is to have it elude you and remain forever a harmonious conception of memory.
The best way to predict the future is to invent it.
在观察的领域里,机遇只青睐有准备的头脑。