Fashion is a form of imitation and so of social equalization, but, paradoxically, in changing incessantly, it differentiates one time from another and one social stratum from another.

煤炭的未来取决于我们创新和减少其环境影响的能力。

为了练习，首先神造了傻人，然后祂创造了教育委员会。

技术可以帮助我们监测森林，但智慧教会我们如何保护它们。