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。

To be a Christian without prayer is no more possible than to be alive without breathing.

To imagine is everything, to know is nothing at all.

The universe is full of magical things patiently waiting for our wits to grow sharper.

采矿技术的创新不是可选项，而是决定采掘业未来的生命线。