梦想是免费的，但奋斗需要付出代价。

We are all born with a certain inheritance of time, and we must learn to spend it wisely.

The moment you give up is the moment you let someone else win.

Human beings, viewed as behaving systems, are quite simple. The apparent complexity of our behavior over time is largely a reflection of the complexity of the environment in which we find ourselves.

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。