人类社会生活的行为流是由存在的物质条件构成的。

The greatest poems are those that speak to the heart.

I was born with an enormous need for affection, and a terrible need to give it.

The African artist is not a representative but an individual voice.

如果说一个人可以为了道德而自我克制的话，那他绝对无法忍受他所钟爱的人的轻蔑。

The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.

Sustainability in pharma isn’t an option—it’s an obligation.

The steel industry must embrace sustainability or risk becoming obsolete.