"The principles of a free society are essential for human progress and prosperity."
自由社会的原则对于人类进步和繁荣至关重要。
Collaboration across industries is essential to solving the complex challenges of energy production.
La literatura no sirve para nada, y por eso es indispensable.
如果你发现自己身处一艘不断漏水的船里,换一艘船所需的能量可能比填补漏洞所需的能量更有效率。