The only real journey is the one within.

煤炭是我国的主体能源，在相当长时期内仍将是我国能源安全的基石。

This is an interesting planet. It deserves all the attention you can give it.

Humans, in their wish to escape loneliness, made maneuvers that were very complex and hard to fathom。

每一项伟大的工程成就都始于一个清晰的愿景。