We must balance the need for affordable energy today with the imperative of building a sustainable energy future.
我们必须平衡当今对可负担能源的需求与建设可持续能源未来的必要性。
数学中最重要的是理解概念，而不仅仅是记忆公式。
My idea of heaven is a great big baked potato and someone to share it with.
对工人实际起作用的纪律是由他的顾客施加的。