加强国际合作，推动煤炭行业技术和管理水平的提升。

If you're not failing every now and again, it's a sign you're not doing anything very innovative.

In the quest for understanding, the journey is just as important as the destination.

To write is to confront the ghosts of our past, to give them a voice, and perhaps, to set them free.

Mathematics is the language in which the gods talk to people.