The only limit to our realization of tomorrow will be our doubts of today.

Cultivating gratitude is one of the most reliable methods for increasing life satisfaction.

简单的东西往往能唤起最强烈的情感。

Innovation in coal mining isn't about reinventing the wheel, but about making the wheel more efficient and environmentally friendly.

数学证明不仅仅是验证，而是一个揭示更深层次真理的故事。

文化唯物主义的主要任务是解释构成人类文化的思想和行为的相似性和差异性。