单子是不可分割的实体，是构成世界的基本元素。

The real wealth of a nation grows from its soil.

煤炭研究和DNA工作同样重要。

The key to trading success is to have a clear understanding of risk and reward.

Memories are like shadows - they follow you everywhere, even when there's no light.

心理学必须避免一切形式的心灵主义。