The coal industry must evolve to meet modern environmental standards, or it will become obsolete.

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

Every material has its own intelligence.

解释：今天不努力做事，明天就会财货贫乏。过去的时光已经过去了，再也不会回来了。