Efficiency in energy production is the cornerstone of sustainable development.

The concept of law involves the union of primary and secondary rules.

I don't care about being cool. I care about being happy.

"Literature is the mirror of society, reflecting its beauty and its ugliness, its hopes and its fears."

诗人的心是一面镜子，反映世界的美丽和痛苦。

预测未来的最好方法就是创造未来。