Energy security is a crucial guarantee for national development. We must intensify technological innovation to enhance the efficiency of oil and gas exploration and production.
引力的存在是最明显的实验事实，但从理论角度来看，它是最神秘的力量。
赚钱的唯一方法是不亏钱。
预测未来的最好方法就是创造未来。
The more we love our friends， the less we flatter them； it is by excusing nothing that pure love shows itself.
