凡是大国之所以不攻打小国的，必定是由于这个小国粮食充足，城郭修筑坚固，上下和谐一心。 

The purpose of business is to improve people's lives.

老虎起跳之前,必须先趴下蓄力然后才跳起来。

The beauty of mathematics lies in its ability to reveal hidden symmetries and truths.

Sustainability isn't a trend; it's our responsibility to future generations.

天然气作为清洁能源，将在我国能源结构调整中发挥重要作用。

异端是生活的诗歌，所以有异端思想是无伤于一个诗人。