谈论社区的利益而不了解个人的利益是徒劳的。
It is vain to talk of the interest of the community， without understanding what is the interest of the individual.
The simplest solutions are often the most elegant.
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。
In mathematics, the journey of discovery is as important as the destination.