The future of democracy depends on the ability of democratic societies to reform themselves.

企业要履行社会责任，在保障能源供应的同时，推动环境保护和可持续发展。

定理当然是数学的永久财富。

"A good line of poetry should surprise you twice: when you write it and when you read it."

The poor are often more entrepreneurial than the rich, but they lack the tools to succeed.