The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

The boy and his heart had become friends, and neither was capable now of betraying the other.

The beauty of biology lies in its ability to explain the diversity of life through simple principles.

我不敢说自己从未担心害怕过。 实际上我希望少一点担心害怕，因为它让我分心，使我焦虑。

每幅画都是自画像，即使它不是。