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。
As a clean energy source, natural gas will play a significant role in China's energy structure adjustment.
The only way to learn mathematics is to do mathematics.
你能做的最好的投资就是投资自己。
To understand behavior, we must look at its purpose in the context of survival and adaptation.